FR2375691A1 - Document-support d'information de securite - Google Patents
Document-support d'information de securiteInfo
- Publication number
- FR2375691A1 FR2375691A1 FR7738233A FR7738233A FR2375691A1 FR 2375691 A1 FR2375691 A1 FR 2375691A1 FR 7738233 A FR7738233 A FR 7738233A FR 7738233 A FR7738233 A FR 7738233A FR 2375691 A1 FR2375691 A1 FR 2375691A1
- Authority
- FR
- France
- Prior art keywords
- information
- security information
- information support
- optical marks
- support document
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/0033—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with cards or other card-like flat carriers, e.g. flat sheets of optical film
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
- G06K1/12—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
- G06K1/126—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching by photographic or thermographic registration
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
- G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
- G06K19/16—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards the marking being a hologram or diffraction grating
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
- G06Q20/34—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using cards, e.g. integrated circuit [IC] cards or magnetic cards
- G06Q20/343—Cards including a counter
- G06Q20/3433—Cards including a counter the counter having monetary units
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
- G07F7/02—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by keys or other credit registering devices
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Strategic Management (AREA)
- General Business, Economics & Management (AREA)
- Computer Networks & Wireless Communication (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Holo Graphy (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Credit Cards Or The Like (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Optical Recording Or Reproduction (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Abstract
Document comportant un support d'information sur lequel une information est enregistrée sous forme de marques optiques. Le support d'information 2 présente une mémoire de forme qui peut être mise en action par apport d'énergie et qui provoque une modification de la forme du support d'information ainsi que des marques optiques 3. Par exemple, dans un support d'information thermoplastique est introduit un champ élastique de tensions 7 qui peut être transformé par chauffage en une première structure de relief, alors que les marques optiques 6 présentent une deuxième structure de relief différente de la première. Application notamment aux documents d'identification.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1608476A CH604279A5 (fr) | 1976-12-21 | 1976-12-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2375691A1 true FR2375691A1 (fr) | 1978-07-21 |
FR2375691B1 FR2375691B1 (fr) | 1981-08-28 |
Family
ID=4414342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7738233A Granted FR2375691A1 (fr) | 1976-12-21 | 1977-12-19 | Document-support d'information de securite |
Country Status (10)
Country | Link |
---|---|
US (1) | US4163570A (fr) |
JP (1) | JPS5378897A (fr) |
BE (1) | BE862062A (fr) |
CH (1) | CH604279A5 (fr) |
DE (1) | DE2701175B2 (fr) |
ES (1) | ES465222A1 (fr) |
FR (1) | FR2375691A1 (fr) |
GB (1) | GB1571458A (fr) |
IT (1) | IT1088835B (fr) |
SE (1) | SE418337B (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0040561A2 (fr) * | 1980-05-21 | 1981-11-25 | Crouzet | Elément de mémoire magnétique thermodestructible |
FR2688614A1 (fr) * | 1992-03-16 | 1993-09-17 | Schlumberger Ind Sa | Carte a memoire electronique avec affichage de la consommation du solde disponible dans sa memoire. |
Families Citing this family (99)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59134088U (ja) * | 1983-02-25 | 1984-09-07 | 明邦産業株式会社 | 楯式ブツク型置時計 |
US4790565A (en) * | 1984-10-24 | 1988-12-13 | Steed Signs Pty., Limited | Game |
US4924078A (en) * | 1987-11-25 | 1990-05-08 | Sant Anselmo Carl | Identification symbol, system and method |
GB8812890D0 (en) * | 1988-05-31 | 1988-07-06 | De La Rue Co Plc | Security device & methods & apparatus for verification |
JPH0220192U (fr) * | 1988-07-25 | 1990-02-09 | ||
US5291006A (en) * | 1989-08-11 | 1994-03-01 | Nhk Spring Co., Ltd. | Authenticity identifying system for information storage cards |
US5200794A (en) * | 1989-08-11 | 1993-04-06 | Nhk Spring Co., Ltd. | Optical head for an optical authenticity identifing system |
US5442433A (en) * | 1989-08-11 | 1995-08-15 | Nhk Spring Co., Ltd. | Identification system for an article having individually attached patches |
DE3932505C2 (de) | 1989-09-28 | 2001-03-15 | Gao Ges Automation Org | Datenträger mit einem optisch variablen Element |
US5109153A (en) * | 1990-04-17 | 1992-04-28 | Johnsen Edward L | Flash imaging and voidable articles |
US5128528A (en) * | 1990-10-15 | 1992-07-07 | Dittler Brothers, Inc. | Matrix encoding devices and methods |
US5282651A (en) * | 1991-04-15 | 1994-02-01 | Frank Alonso | Trading cards and method of concealing and revealing information thereon |
JPH07111726B2 (ja) * | 1991-12-26 | 1995-11-29 | 日本発条株式会社 | 対象物の識別構造及び識別体 |
JP2520346B2 (ja) * | 1992-04-28 | 1996-07-31 | 日本発条株式会社 | 対象物の識別構造 |
US6219015B1 (en) * | 1992-04-28 | 2001-04-17 | The Board Of Directors Of The Leland Stanford, Junior University | Method and apparatus for using an array of grating light valves to produce multicolor optical images |
US5454598A (en) * | 1993-04-19 | 1995-10-03 | Wicker; David M. | Tamper and copy protected documents |
US5466011A (en) * | 1994-04-06 | 1995-11-14 | Cohn; David L. | Cable identification system |
US5873604A (en) * | 1995-05-25 | 1999-02-23 | Verify First Technologies, Inc. | Document security system having thermo-activated pantograph and validation mark |
US5704651A (en) * | 1995-05-25 | 1998-01-06 | Verify First Technologies, Inc. | Counterfeit resistant documents and methods |
US5772248A (en) * | 1995-12-07 | 1998-06-30 | Verify First Technologies, Inc. | Document with tamper and counterfeit resistant relief markings |
US5661592A (en) * | 1995-06-07 | 1997-08-26 | Silicon Light Machines | Method of making and an apparatus for a flat diffraction grating light valve |
US5798743A (en) * | 1995-06-07 | 1998-08-25 | Silicon Light Machines | Clear-behind matrix addressing for display systems |
US5629801A (en) * | 1995-06-07 | 1997-05-13 | Silicon Light Machines | Diffraction grating light doubling collection system |
US5841579A (en) * | 1995-06-07 | 1998-11-24 | Silicon Light Machines | Flat diffraction grating light valve |
US5762378A (en) * | 1996-02-16 | 1998-06-09 | Verify First Technologies, Inc. | Tamper resistant validation marks |
US6064404A (en) * | 1996-11-05 | 2000-05-16 | Silicon Light Machines | Bandwidth and frame buffer size reduction in a digital pulse-width-modulated display system |
US6573983B1 (en) | 1996-11-15 | 2003-06-03 | Diebold, Incorporated | Apparatus and method for processing bank notes and other documents in an automated banking machine |
US7559460B2 (en) | 1996-11-15 | 2009-07-14 | Diebold Incorporated | Automated banking machine |
US7513417B2 (en) | 1996-11-15 | 2009-04-07 | Diebold, Incorporated | Automated banking machine |
US7584883B2 (en) | 1996-11-15 | 2009-09-08 | Diebold, Incorporated | Check cashing automated banking machine |
US5923413A (en) * | 1996-11-15 | 1999-07-13 | Interbold | Universal bank note denominator and validator |
US5982553A (en) * | 1997-03-20 | 1999-11-09 | Silicon Light Machines | Display device incorporating one-dimensional grating light-valve array |
US6088102A (en) * | 1997-10-31 | 2000-07-11 | Silicon Light Machines | Display apparatus including grating light-valve array and interferometric optical system |
US6271808B1 (en) | 1998-06-05 | 2001-08-07 | Silicon Light Machines | Stereo head mounted display using a single display device |
US6130770A (en) * | 1998-06-23 | 2000-10-10 | Silicon Light Machines | Electron gun activated grating light valve |
US6101036A (en) * | 1998-06-23 | 2000-08-08 | Silicon Light Machines | Embossed diffraction grating alone and in combination with changeable image display |
US6215579B1 (en) | 1998-06-24 | 2001-04-10 | Silicon Light Machines | Method and apparatus for modulating an incident light beam for forming a two-dimensional image |
US6303986B1 (en) * | 1998-07-29 | 2001-10-16 | Silicon Light Machines | Method of and apparatus for sealing an hermetic lid to a semiconductor die |
US6872984B1 (en) | 1998-07-29 | 2005-03-29 | Silicon Light Machines Corporation | Method of sealing a hermetic lid to a semiconductor die at an angle |
US6386446B1 (en) * | 1998-12-17 | 2002-05-14 | International Business Machines Cirporation | Method for use of transaction media encoded with write-and-destroy entries |
US6822769B1 (en) | 1999-06-01 | 2004-11-23 | De La Rue International Limited | Security device |
AUPQ119999A0 (en) * | 1999-06-25 | 1999-07-22 | Note Printing Australia Limited | Improved security documents |
US6956878B1 (en) | 2000-02-07 | 2005-10-18 | Silicon Light Machines Corporation | Method and apparatus for reducing laser speckle using polarization averaging |
FR2809517B1 (fr) * | 2000-05-23 | 2007-03-02 | Centre Nat Rech Scient | Procede de marquage d'un materiau et procede de lecture de ce marquage |
US6387723B1 (en) * | 2001-01-19 | 2002-05-14 | Silicon Light Machines | Reduced surface charging in silicon-based devices |
US7177081B2 (en) * | 2001-03-08 | 2007-02-13 | Silicon Light Machines Corporation | High contrast grating light valve type device |
US20030208753A1 (en) * | 2001-04-10 | 2003-11-06 | Silicon Light Machines | Method, system, and display apparatus for encrypted cinema |
US6707591B2 (en) * | 2001-04-10 | 2004-03-16 | Silicon Light Machines | Angled illumination for a single order light modulator based projection system |
US6865346B1 (en) | 2001-06-05 | 2005-03-08 | Silicon Light Machines Corporation | Fiber optic transceiver |
US6782205B2 (en) * | 2001-06-25 | 2004-08-24 | Silicon Light Machines | Method and apparatus for dynamic equalization in wavelength division multiplexing |
US6747781B2 (en) * | 2001-06-25 | 2004-06-08 | Silicon Light Machines, Inc. | Method, apparatus, and diffuser for reducing laser speckle |
US6646778B2 (en) * | 2001-08-01 | 2003-11-11 | Silicon Light Machines | Grating light valve with encapsulated dampening gas |
US6829092B2 (en) * | 2001-08-15 | 2004-12-07 | Silicon Light Machines, Inc. | Blazed grating light valve |
US6639722B2 (en) * | 2001-08-15 | 2003-10-28 | Silicon Light Machines | Stress tuned blazed grating light valve |
US6930364B2 (en) | 2001-09-13 | 2005-08-16 | Silicon Light Machines Corporation | Microelectronic mechanical system and methods |
US6956995B1 (en) | 2001-11-09 | 2005-10-18 | Silicon Light Machines Corporation | Optical communication arrangement |
US6692129B2 (en) * | 2001-11-30 | 2004-02-17 | Silicon Light Machines | Display apparatus including RGB color combiner and 1D light valve relay including schlieren filter |
US6800238B1 (en) | 2002-01-15 | 2004-10-05 | Silicon Light Machines, Inc. | Method for domain patterning in low coercive field ferroelectrics |
US6767751B2 (en) | 2002-05-28 | 2004-07-27 | Silicon Light Machines, Inc. | Integrated driver process flow |
US6728023B1 (en) | 2002-05-28 | 2004-04-27 | Silicon Light Machines | Optical device arrays with optimized image resolution |
US6839479B2 (en) * | 2002-05-29 | 2005-01-04 | Silicon Light Machines Corporation | Optical switch |
US7054515B1 (en) | 2002-05-30 | 2006-05-30 | Silicon Light Machines Corporation | Diffractive light modulator-based dynamic equalizer with integrated spectral monitor |
US6822797B1 (en) | 2002-05-31 | 2004-11-23 | Silicon Light Machines, Inc. | Light modulator structure for producing high-contrast operation using zero-order light |
US6829258B1 (en) | 2002-06-26 | 2004-12-07 | Silicon Light Machines, Inc. | Rapidly tunable external cavity laser |
US6714337B1 (en) | 2002-06-28 | 2004-03-30 | Silicon Light Machines | Method and device for modulating a light beam and having an improved gamma response |
US6908201B2 (en) * | 2002-06-28 | 2005-06-21 | Silicon Light Machines Corporation | Micro-support structures |
US6813059B2 (en) * | 2002-06-28 | 2004-11-02 | Silicon Light Machines, Inc. | Reduced formation of asperities in contact micro-structures |
US6801354B1 (en) | 2002-08-20 | 2004-10-05 | Silicon Light Machines, Inc. | 2-D diffraction grating for substantially eliminating polarization dependent losses |
US7057795B2 (en) | 2002-08-20 | 2006-06-06 | Silicon Light Machines Corporation | Micro-structures with individually addressable ribbon pairs |
US6712480B1 (en) | 2002-09-27 | 2004-03-30 | Silicon Light Machines | Controlled curvature of stressed micro-structures |
US6928207B1 (en) | 2002-12-12 | 2005-08-09 | Silicon Light Machines Corporation | Apparatus for selectively blocking WDM channels |
US7057819B1 (en) | 2002-12-17 | 2006-06-06 | Silicon Light Machines Corporation | High contrast tilting ribbon blazed grating |
US6987600B1 (en) | 2002-12-17 | 2006-01-17 | Silicon Light Machines Corporation | Arbitrary phase profile for better equalization in dynamic gain equalizer |
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US6927891B1 (en) | 2002-12-23 | 2005-08-09 | Silicon Light Machines Corporation | Tilt-able grating plane for improved crosstalk in 1×N blaze switches |
US7068372B1 (en) | 2003-01-28 | 2006-06-27 | Silicon Light Machines Corporation | MEMS interferometer-based reconfigurable optical add-and-drop multiplexor |
US7286764B1 (en) | 2003-02-03 | 2007-10-23 | Silicon Light Machines Corporation | Reconfigurable modulator-based optical add-and-drop multiplexer |
US6947613B1 (en) | 2003-02-11 | 2005-09-20 | Silicon Light Machines Corporation | Wavelength selective switch and equalizer |
US6922272B1 (en) | 2003-02-14 | 2005-07-26 | Silicon Light Machines Corporation | Method and apparatus for leveling thermal stress variations in multi-layer MEMS devices |
US6922273B1 (en) | 2003-02-28 | 2005-07-26 | Silicon Light Machines Corporation | PDL mitigation structure for diffractive MEMS and gratings |
US6806997B1 (en) | 2003-02-28 | 2004-10-19 | Silicon Light Machines, Inc. | Patterned diffractive light modulator ribbon for PDL reduction |
US7027202B1 (en) | 2003-02-28 | 2006-04-11 | Silicon Light Machines Corp | Silicon substrate as a light modulator sacrificial layer |
US7391973B1 (en) | 2003-02-28 | 2008-06-24 | Silicon Light Machines Corporation | Two-stage gain equalizer |
US7042611B1 (en) | 2003-03-03 | 2006-05-09 | Silicon Light Machines Corporation | Pre-deflected bias ribbons |
US20070194239A1 (en) * | 2006-01-31 | 2007-08-23 | Mcallister Abraham | Apparatus and method providing a hand-held spectrometer |
US7891818B2 (en) * | 2006-12-12 | 2011-02-22 | Evans & Sutherland Computer Corporation | System and method for aligning RGB light in a single modulator projector |
US20080259988A1 (en) * | 2007-01-19 | 2008-10-23 | Evans & Sutherland Computer Corporation | Optical actuator with improved response time and method of making the same |
US20090002644A1 (en) * | 2007-05-21 | 2009-01-01 | Evans & Sutherland Computer Corporation | Invisible scanning safety system |
WO2009033122A1 (fr) * | 2007-09-07 | 2009-03-12 | Evans & Sutherland Computer Corporation | Dispositif et procédé pour réduire l'étendue optique dans un laser à diode |
US20090219491A1 (en) * | 2007-10-18 | 2009-09-03 | Evans & Sutherland Computer Corporation | Method of combining multiple Gaussian beams for efficient uniform illumination of one-dimensional light modulators |
US8358317B2 (en) * | 2008-05-23 | 2013-01-22 | Evans & Sutherland Computer Corporation | System and method for displaying a planar image on a curved surface |
US8702248B1 (en) | 2008-06-11 | 2014-04-22 | Evans & Sutherland Computer Corporation | Projection method for reducing interpixel gaps on a viewing surface |
US8077378B1 (en) | 2008-11-12 | 2011-12-13 | Evans & Sutherland Computer Corporation | Calibration system and method for light modulation device |
DE102010050031A1 (de) * | 2010-11-02 | 2012-05-03 | Ovd Kinegram Ag | Sicherheitselement und Verfahren zur Herstellung eines Sicherheitselements |
EP2579217A1 (fr) * | 2011-10-04 | 2013-04-10 | Deutsche Post AG | Procédé et dispositif de marquage d'étiquettes de valeur |
US9641826B1 (en) | 2011-10-06 | 2017-05-02 | Evans & Sutherland Computer Corporation | System and method for displaying distant 3-D stereo on a dome surface |
US11512902B2 (en) | 2017-11-01 | 2022-11-29 | Holtec International | Flow baffles for shell and tube heat exchangers |
US11796255B2 (en) | 2017-02-24 | 2023-10-24 | Holtec International | Air-cooled condenser with deflection limiter beams |
DE102019003947A1 (de) * | 2019-06-06 | 2020-12-10 | Giesecke+Devrient Currency Technology Gmbh | Verfahren zum Herstellen eines optisch variablen Sicherheitselements |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2279162A1 (fr) * | 1974-07-19 | 1976-02-13 | Landis & Gyr Ag | Dispositif de paiement, sans argent liquide, de marchandises ou de services |
-
1976
- 1976-12-21 CH CH1608476A patent/CH604279A5/xx not_active IP Right Cessation
-
1977
- 1977-01-13 DE DE2701175A patent/DE2701175B2/de active Granted
- 1977-11-07 US US05/848,871 patent/US4163570A/en not_active Expired - Lifetime
- 1977-12-02 JP JP14408477A patent/JPS5378897A/ja active Granted
- 1977-12-14 SE SE7714165A patent/SE418337B/sv not_active IP Right Cessation
- 1977-12-14 GB GB52044/77A patent/GB1571458A/en not_active Expired
- 1977-12-16 IT IT30828/77A patent/IT1088835B/it active
- 1977-12-19 FR FR7738233A patent/FR2375691A1/fr active Granted
- 1977-12-20 BE BE183627A patent/BE862062A/fr not_active IP Right Cessation
- 1977-12-20 ES ES465222A patent/ES465222A1/es not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2279162A1 (fr) * | 1974-07-19 | 1976-02-13 | Landis & Gyr Ag | Dispositif de paiement, sans argent liquide, de marchandises ou de services |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0040561A2 (fr) * | 1980-05-21 | 1981-11-25 | Crouzet | Elément de mémoire magnétique thermodestructible |
EP0040561A3 (en) * | 1980-05-21 | 1981-12-02 | Crouzet | Thermally destructible magnetic memory element |
FR2688614A1 (fr) * | 1992-03-16 | 1993-09-17 | Schlumberger Ind Sa | Carte a memoire electronique avec affichage de la consommation du solde disponible dans sa memoire. |
EP0564012A1 (fr) * | 1992-03-16 | 1993-10-06 | Schlumberger Industries | Carte à mémoire électronique avec affichage du solde disponible dans sa mémoire |
Also Published As
Publication number | Publication date |
---|---|
SE418337B (sv) | 1981-05-18 |
US4163570A (en) | 1979-08-07 |
SE7714165L (sv) | 1978-06-22 |
FR2375691B1 (fr) | 1981-08-28 |
CH604279A5 (fr) | 1978-08-31 |
JPS553755B2 (fr) | 1980-01-26 |
DE2701175C3 (fr) | 1981-01-22 |
ES465222A1 (es) | 1978-09-16 |
IT1088835B (it) | 1985-06-10 |
JPS5378897A (en) | 1978-07-12 |
DE2701175B2 (de) | 1980-05-08 |
DE2701175A1 (de) | 1978-06-22 |
GB1571458A (en) | 1980-07-16 |
BE862062A (fr) | 1978-04-14 |
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JPS5431706A (en) | Magnetic recorder-reproducer |
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