FR2410526A1 - Perfectionnements apportes aux forets - Google Patents
Perfectionnements apportes aux foretsInfo
- Publication number
- FR2410526A1 FR2410526A1 FR7833663A FR7833663A FR2410526A1 FR 2410526 A1 FR2410526 A1 FR 2410526A1 FR 7833663 A FR7833663 A FR 7833663A FR 7833663 A FR7833663 A FR 7833663A FR 2410526 A1 FR2410526 A1 FR 2410526A1
- Authority
- FR
- France
- Prior art keywords
- forest
- drill
- rotation
- center
- cutting
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2240/00—Details of connections of tools or workpieces
- B23B2240/08—Brazed connections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/18—Configuration of the drill point
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/24—Overall form of drilling tools
- B23B2251/241—Cross sections of the diameter of the drill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/48—Chip breakers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/50—Drilling tools comprising cutting inserts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/19—Rotary cutting tool
- Y10T407/1946—Face or end mill
- Y10T407/1948—Face or end mill with cutting edge entirely across end of tool [e.g., router bit, end mill, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/03—Processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/78—Tool of specific diverse material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
- Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
- Y10T408/9097—Spiral channel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
FORET CARACTERISE EN CE QU'IL COMPORTE UNE PAIRE D'ARETES EN SPIRALE S'ETENDANT A PARTIR DU CENTRE DE ROTATION DU FORET, SYMETRIQUEMENT PAR RAPPORT AU CENTRE ET INCURVEES VERS L'EXTERIEUR SELON LE SENS DE ROTATION DU FORET, LA COURBURE ETANT PLUS IMPORTANTE DANS LA PARTIE CENTRALE QUE DANS LA PARTIE PERIPHERIQUE EXTERNE DU FORET, EN REGARDANT PAR EN DESSOUS, ET EN CE QUE CHACUNE DES ARETES COUPANTES DU FORET EST MUNIE D'UNE SURFACE DE DEGAGEMENT DONT L'ANGLE DE DEGAGEMENT EST VOISIN DE ZERO A LA PARTIE DE CETTE SURFACE CORRESPONDANT A LA PARTIE DE COUPE.
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14558877A JPS6023925B2 (ja) | 1977-12-03 | 1977-12-03 | 渦巻き刃ドリル |
JP52145589A JPS5837085B2 (ja) | 1977-12-03 | 1977-12-03 | 渦巻き刃ドリル |
JP52145587A JPS6023924B2 (ja) | 1977-12-03 | 1977-12-03 | 渦巻き刃ドリル |
JP53010136A JPS5943244B2 (ja) | 1978-01-31 | 1978-01-31 | チゼルなし渦巻き刃ドリル |
KR7803655A KR820000400B1 (ko) | 1977-12-03 | 1978-12-05 | 나선형 절삭날을 가진 드릴 |
KR8200427A KR820000399B1 (ko) | 1977-12-03 | 1982-02-02 | 치즐(chisel)이 없는 나선형 절삭날을 가진 드릴 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2410526A1 true FR2410526A1 (fr) | 1979-06-29 |
FR2410526B1 FR2410526B1 (fr) | 1983-02-25 |
Family
ID=27548248
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7833663A Granted FR2410526A1 (fr) | 1977-12-03 | 1978-11-29 | Perfectionnements apportes aux forets |
Country Status (9)
Country | Link |
---|---|
US (2) | US4222690A (fr) |
BR (1) | BR7807813A (fr) |
CA (1) | CA1086995A (fr) |
DE (1) | DE2851183C2 (fr) |
FR (1) | FR2410526A1 (fr) |
GB (1) | GB2010142B (fr) |
IN (1) | IN149349B (fr) |
IT (1) | IT1192615B (fr) |
SE (1) | SE440324B (fr) |
Families Citing this family (72)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4565471A (en) * | 1979-10-02 | 1986-01-21 | Mitsubishi Kinzoku Kabushiki Kaisha | Drill bit |
US4373839A (en) * | 1979-10-02 | 1983-02-15 | Mitsubishi Kinzoku Kabushiki Kaisha | Drill bit |
DE3131794C2 (de) * | 1980-08-29 | 1986-08-07 | Toshiaki Osaka Hosoi | Bohrer |
US4456411A (en) * | 1981-08-10 | 1984-06-26 | Burke Clement | Twist drill |
SE452271B (sv) * | 1982-04-01 | 1987-11-23 | Sandvik Ab | Sker och verktyg for spanskerande bearbetning |
JPS5981010A (ja) * | 1982-10-29 | 1984-05-10 | Nippon Oil & Fats Co Ltd | 穴明け工具 |
US4605347A (en) * | 1982-12-27 | 1986-08-12 | Lockheed Missiles & Space Company, Inc. | High speed drill reamer |
US4561813A (en) * | 1983-06-06 | 1985-12-31 | M. A. Ford Mfg. Co., Inc. | Drill |
SE454421B (sv) * | 1984-07-12 | 1988-05-02 | Sandvik Ab | Borr med utbytbar borrspets |
US4625593A (en) * | 1984-08-07 | 1986-12-02 | Schmotzer Norman H | Wood drill and method of construction |
SE447880B (sv) * | 1985-05-17 | 1986-12-22 | Santrade Ltd | Borr med lostagbar borrspets |
SE456893B (sv) * | 1985-06-17 | 1988-11-14 | Sandvik Ab | Verktyg med loedda skaer foer spaanavskiljande bearbetning |
DE3619245A1 (de) * | 1985-09-18 | 1987-03-26 | Hertel Karl | Spiralbohrer |
US4759667A (en) * | 1985-11-08 | 1988-07-26 | American Telephone And Telegraph Company, At&T Technologies, Inc. | Twist drill for drilling printed circuit board laminates and having an drill point geometry |
ES2029456T3 (es) * | 1986-06-07 | 1992-08-16 | Hertel Aktiengesellschaft Werkzeuge + Hartstoffe | Procedimiento para el afilado de una broca espiral. |
US4756650A (en) * | 1986-11-26 | 1988-07-12 | Kabushiki Kaisha Kobe Seiko Sho | Twist drill |
GB8714340D0 (en) * | 1987-06-18 | 1987-07-22 | Manxtal Cutting Tools Ltd | Drill bit |
SE455770B (sv) * | 1987-07-02 | 1988-08-08 | Sandvik Ab | Borr med utbytbara sker |
JP2603993B2 (ja) * | 1988-03-11 | 1997-04-23 | 俊明 細井 | ドリル |
US5011342A (en) * | 1988-03-14 | 1991-04-30 | 501 Greenfield Industries, Inc. | Twist drill |
SE461024B (sv) * | 1988-06-23 | 1989-12-18 | Sandvik Ab | Borr |
JPH0215908A (ja) * | 1988-07-04 | 1990-01-19 | Toshiaki Hosoi | ドリル、ドリルの研摩方法および研摩装置 |
US4898503A (en) * | 1988-07-05 | 1990-02-06 | Lockheed Corporation | Twist drill |
GB8819820D0 (en) * | 1988-08-20 | 1988-09-21 | Tucker Fasteners Ltd | Anchors for fixing to dense concrete masonry &c |
JPH02198707A (ja) * | 1989-01-24 | 1990-08-07 | Masao Kubota | ドリル |
SE500310C2 (sv) * | 1990-12-03 | 1994-05-30 | Sandvik Ab | Skär och verktyg för skalsvarvning |
JP2513645Y2 (ja) * | 1991-05-22 | 1996-10-09 | 三菱マテリアル株式会社 | ボ―ルエンドミル |
SE502255C2 (sv) * | 1991-12-16 | 1995-09-25 | Sandvik Ab | Borr med spånkanaler, innefattande en första och en andra spånmatande zon, med olika tvärsnitt |
US5209612A (en) * | 1992-03-27 | 1993-05-11 | The Budd Company | Cutting tool |
US5273380A (en) * | 1992-07-31 | 1993-12-28 | Musacchia James E | Drill bit point |
SE507842C2 (sv) * | 1992-09-24 | 1998-07-20 | Sandvik Ab | Borr |
US5375672A (en) * | 1992-10-22 | 1994-12-27 | Sandvik Rock Tools, Inc. | Mine roof drill bit and cutting insert therefor |
US5628837A (en) * | 1993-11-15 | 1997-05-13 | Rogers Tool Works, Inc. | Surface decarburization of a drill bit having a refined primary cutting edge |
US5609447A (en) * | 1993-11-15 | 1997-03-11 | Rogers Tool Works, Inc. | Surface decarburization of a drill bit |
US5452971A (en) * | 1994-03-08 | 1995-09-26 | Nevills; Alva D. | Rotary end cutting tool |
US6168355B1 (en) * | 1994-05-06 | 2001-01-02 | Lon J. Wardell | End-mill tool with multiple cutting edges |
SE504312C2 (sv) * | 1994-10-28 | 1997-01-13 | Sandvik Ab | Metod att bearbeta kompositer |
US6036410A (en) * | 1994-12-27 | 2000-03-14 | Shun'ko; Evgeny V. | Tip portion of the drill bit |
SE507827C2 (sv) * | 1996-05-02 | 1998-07-20 | Sandvik Ab | Borr |
DE69709351T2 (de) * | 1996-05-02 | 2002-08-14 | Sandvik Ab | Bohrer |
US6044919A (en) * | 1997-07-31 | 2000-04-04 | Briese Industrial Technologies, Inc. | Rotary spade drill arrangement |
US5975811A (en) * | 1997-07-31 | 1999-11-02 | Briese Industrial Technologies, Inc. | Cutting insert cartridge arrangement |
US6026916A (en) * | 1997-08-01 | 2000-02-22 | Briese Industrial Technologies, Inc. | Rotary drill arrangement |
US5980169A (en) * | 1997-10-16 | 1999-11-09 | Fisch Precision Tool Co., Inc. | Brad point drill bit |
IL123858A (en) * | 1998-03-27 | 2003-05-29 | Iscar Ltd | Drilling head |
US6056486A (en) * | 1998-07-15 | 2000-05-02 | Colvin; Kevin F. | Cutting tool point |
US5967712A (en) * | 1998-11-03 | 1999-10-19 | Kennametal Inc. | Cutting tool for machining bores in materials having spring-back |
US6227774B1 (en) | 1999-06-24 | 2001-05-08 | Tetrason Diversified Corp. | Spade drill bit |
DE19955172A1 (de) * | 1999-11-16 | 2001-05-23 | Kennametal Inc | Verfahren zum Schleifen einer Bohrspitze und Bohrerspitze |
SE519575C2 (sv) * | 2000-04-11 | 2003-03-18 | Sandvik Ab | Borrdkär för metallborrning |
JP4415485B2 (ja) * | 2000-11-14 | 2010-02-17 | 三菱マテリアル株式会社 | 小型ドリル |
US7114893B2 (en) * | 2001-03-27 | 2006-10-03 | Allied Machine & Engineering Corp. | Drill insert geometry having V-notched web |
US6685402B2 (en) * | 2001-03-27 | 2004-02-03 | Allied Machine & Engineering Corp. | Drill insert geometry having V-notched web |
US6676342B2 (en) * | 2002-01-09 | 2004-01-13 | Allied Machine & Engineering Corp. | Drill with specialized drill point geometry |
CA2494062C (fr) * | 2002-08-08 | 2016-06-14 | Liam Patrick Ellis | Trepan et procede de production d'un trepan |
US7832966B2 (en) * | 2003-01-30 | 2010-11-16 | Kennametal Inc. | Drill for making flat bottom hole |
US7140815B2 (en) * | 2003-01-30 | 2006-11-28 | Kennametal Inc. | Drill for making flat bottom hole |
DE10353514A1 (de) * | 2003-11-14 | 2005-06-23 | Heule, Ulf | Bohrplatte mit klemmender Befestigung in einem Grundkörper |
DE10361065A1 (de) * | 2003-12-23 | 2005-07-28 | Robert Bosch Gmbh | Mehrzweckbohrwerkzeug |
US20070036622A1 (en) * | 2005-08-12 | 2007-02-15 | Yg-1 Co., Ltd. | Spade drill insert |
US20100003094A1 (en) * | 2007-01-09 | 2010-01-07 | Irwin Industrial Tool Company | Drill bit |
JP5194637B2 (ja) * | 2007-08-21 | 2013-05-08 | 三菱マテリアル株式会社 | エンドミル |
DE102008023856A1 (de) * | 2008-05-16 | 2009-11-19 | Gühring Ohg | Mehrschneidiges Vollhartmetall-Bohrwerkzeug |
US8408850B2 (en) * | 2009-06-16 | 2013-04-02 | Kennametal Inc. | Twist drill with negative axial rake transition between the lip and the secondary cutting edge |
IL202196A (en) * | 2009-11-17 | 2015-03-31 | Kennametal Inc | Optimizing the geometric cutting edge in spherical nibs |
JP5051801B2 (ja) * | 2011-03-03 | 2012-10-17 | 株式会社ビック・ツール | ドリル |
EP2517812B1 (fr) * | 2011-04-05 | 2014-12-31 | SECO TOOLS AB (publ) | Tête de coupe comportant une pointe de mèche et foret doté d'une telle tête de coupe |
US20120308319A1 (en) * | 2011-06-03 | 2012-12-06 | Karthik Sampath | Rotary cutting tool having coated cutting tip and coolant holes and method of fabricating |
US10518336B2 (en) * | 2014-11-21 | 2019-12-31 | Kyocera Corporation | Drill and method of manufacturing machined product using the same |
JP6620939B2 (ja) * | 2016-04-18 | 2019-12-18 | 株式会社NejiLaw | 切削用工具 |
EP3569351A1 (fr) * | 2018-05-14 | 2019-11-20 | AB Sandvik Coromant | Ébauche d'outil nervurée et foret |
WO2022179709A1 (fr) | 2021-02-26 | 2022-09-01 | Gripp-X B.V. | Foret |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1746046A (en) * | 1926-04-03 | 1930-02-04 | Edward Ogden Company J | Drill |
US1859202A (en) * | 1928-09-08 | 1932-05-17 | Cleveland Twist Drill Co | Drill |
FR813333A (fr) * | 1936-02-05 | 1937-05-31 | Foret perfectionné et machine pour son affûtage | |
DE669906C (de) * | 1933-02-19 | 1939-01-07 | Izidor Nemenyi | Metallbohrer |
US2334089A (en) * | 1939-11-06 | 1943-11-09 | Erik E Hallden | Drill |
CH327036A (de) * | 1953-11-05 | 1958-01-15 | Firth Brown Tools Limited | Spiralbohrer |
US2903922A (en) * | 1957-06-24 | 1959-09-15 | Cincinnati Milling Machine Co | Self-centering drill |
FR1352808A (fr) * | 1961-04-21 | 1964-02-21 | Perfectionnements aux forets hélicoïdaux | |
US3564957A (en) * | 1967-06-26 | 1971-02-23 | Wickman Mach Tool Sales Ltd | Control systems for machine tools |
DE2228122A1 (de) * | 1972-06-09 | 1973-12-20 | Kemmer Kg Paul | Spiralbohrer, insbesondere hartmetallbohrer, zur bohrbearbeitung von aus kunstharz hergestellten werkstueckplatten |
FR2200077A1 (fr) * | 1972-09-25 | 1974-04-19 | Hawera Probst Kg Hartmetall | |
US4116580A (en) * | 1977-04-08 | 1978-09-26 | Mcdonnell Douglas Corporation | All cutting edge drill |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US750537A (en) * | 1904-01-26 | Drilling-tool | ||
DE83531C (de) * | 1894-06-02 | 1895-10-21 | Cylindrischer Bohrer mit gerader oder schraubenförmig gewundener Längsnuth | |
BE524021A (fr) * | 1951-10-12 | |||
US2778252A (en) * | 1956-09-26 | 1957-01-22 | Nat Twist Drill & Tool Company | Self-thinned heavy-duty twist drill structure |
US2966081A (en) * | 1959-03-18 | 1960-12-27 | United Greenfield Corp | Drill |
US3680262A (en) * | 1969-11-03 | 1972-08-01 | Omark Winslow Co | End mill grinder |
JPS5331286A (en) * | 1976-09-02 | 1978-03-24 | Riyousuke Hosoi | Ball end mill |
US4123186A (en) * | 1977-05-06 | 1978-10-31 | Ford Motor Company | Tool for machining clay |
-
1978
- 1978-11-17 US US05/961,810 patent/US4222690A/en not_active Expired - Lifetime
- 1978-11-27 GB GB7846145A patent/GB2010142B/en not_active Expired
- 1978-11-27 DE DE2851183A patent/DE2851183C2/de not_active Expired
- 1978-11-28 CA CA317,006A patent/CA1086995A/fr not_active Expired
- 1978-11-28 BR BR7807813A patent/BR7807813A/pt unknown
- 1978-11-29 FR FR7833663A patent/FR2410526A1/fr active Granted
- 1978-11-30 IT IT52151/78A patent/IT1192615B/it active
- 1978-12-01 IN IN1289/CAL/78A patent/IN149349B/en unknown
- 1978-12-01 SE SE7812393A patent/SE440324B/sv not_active IP Right Cessation
-
1980
- 1980-02-22 US US06/123,615 patent/US4381162A/en not_active Expired - Lifetime
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1746046A (en) * | 1926-04-03 | 1930-02-04 | Edward Ogden Company J | Drill |
US1859202A (en) * | 1928-09-08 | 1932-05-17 | Cleveland Twist Drill Co | Drill |
DE669906C (de) * | 1933-02-19 | 1939-01-07 | Izidor Nemenyi | Metallbohrer |
FR813333A (fr) * | 1936-02-05 | 1937-05-31 | Foret perfectionné et machine pour son affûtage | |
US2334089A (en) * | 1939-11-06 | 1943-11-09 | Erik E Hallden | Drill |
CH327036A (de) * | 1953-11-05 | 1958-01-15 | Firth Brown Tools Limited | Spiralbohrer |
US2903922A (en) * | 1957-06-24 | 1959-09-15 | Cincinnati Milling Machine Co | Self-centering drill |
FR1352808A (fr) * | 1961-04-21 | 1964-02-21 | Perfectionnements aux forets hélicoïdaux | |
US3564957A (en) * | 1967-06-26 | 1971-02-23 | Wickman Mach Tool Sales Ltd | Control systems for machine tools |
DE2228122A1 (de) * | 1972-06-09 | 1973-12-20 | Kemmer Kg Paul | Spiralbohrer, insbesondere hartmetallbohrer, zur bohrbearbeitung von aus kunstharz hergestellten werkstueckplatten |
FR2200077A1 (fr) * | 1972-09-25 | 1974-04-19 | Hawera Probst Kg Hartmetall | |
US4116580A (en) * | 1977-04-08 | 1978-09-26 | Mcdonnell Douglas Corporation | All cutting edge drill |
Non-Patent Citations (1)
Title |
---|
EXBK/62 * |
Also Published As
Publication number | Publication date |
---|---|
GB2010142A (en) | 1979-06-27 |
SE440324B (sv) | 1985-07-29 |
US4222690A (en) | 1980-09-16 |
BR7807813A (pt) | 1979-07-31 |
IN149349B (fr) | 1981-10-31 |
US4381162A (en) | 1983-04-26 |
SE7812393L (sv) | 1979-06-04 |
CA1086995A (fr) | 1980-10-07 |
FR2410526B1 (fr) | 1983-02-25 |
DE2851183A1 (de) | 1979-06-13 |
IT1192615B (it) | 1988-04-27 |
GB2010142B (en) | 1982-03-10 |
IT7852151A0 (it) | 1978-11-30 |
DE2851183C2 (de) | 1984-05-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CL | Concession to grant licences |