FI875763A0 - Ritningsprojektor. - Google Patents
Ritningsprojektor.Info
- Publication number
- FI875763A0 FI875763A0 FI875763A FI875763A FI875763A0 FI 875763 A0 FI875763 A0 FI 875763A0 FI 875763 A FI875763 A FI 875763A FI 875763 A FI875763 A FI 875763A FI 875763 A0 FI875763 A0 FI 875763A0
- Authority
- FI
- Finland
- Prior art keywords
- ritningsprojektor
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S353/00—Optics: image projectors
- Y10S353/03—Transparent
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI875763A FI88214C (fi) | 1987-12-30 | 1987-12-30 | Bildkastare |
EP89907761A EP0479779A1 (en) | 1987-12-30 | 1989-06-28 | Overhead projector |
US07/778,967 US5214459A (en) | 1987-12-30 | 1989-06-28 | Overhead projectors |
PCT/FI1989/000124 WO1991000546A1 (en) | 1987-12-30 | 1989-06-28 | Overhead projector |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI875763 | 1987-12-30 | ||
FI875763A FI88214C (fi) | 1987-12-30 | 1987-12-30 | Bildkastare |
Publications (4)
Publication Number | Publication Date |
---|---|
FI875763A0 true FI875763A0 (fi) | 1987-12-30 |
FI875763A FI875763A (fi) | 1989-07-01 |
FI88214B FI88214B (fi) | 1992-12-31 |
FI88214C FI88214C (fi) | 1993-04-13 |
Family
ID=8525639
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI875763A FI88214C (fi) | 1987-12-30 | 1987-12-30 | Bildkastare |
Country Status (4)
Country | Link |
---|---|
US (1) | US5214459A (fi) |
EP (1) | EP0479779A1 (fi) |
FI (1) | FI88214C (fi) |
WO (1) | WO1991000546A1 (fi) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2269680A (en) * | 1992-08-13 | 1994-02-16 | David Main | Overhead projector display device having slidable support frame and opaque blind |
US5823651A (en) * | 1996-10-07 | 1998-10-20 | Helot; Jacques H. | Display adapter for overhead projector presentation |
US6017124A (en) * | 1998-06-25 | 2000-01-25 | Siems; Kent | Shielding device for the reduction of unwanted reflection from an overhead projector |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1234408B (de) * | 1961-12-11 | 1967-02-16 | Voigtlaender Ag | Dia- oder Laufbildprojektor mit veraenderbarer Blende |
US3531193A (en) * | 1967-08-11 | 1970-09-29 | Robert B Diehl | Transparency holder for overhead projections |
SE348564B (fi) * | 1967-10-04 | 1972-09-04 | Minnesota Mining & Mfg | |
US3661449A (en) * | 1969-05-19 | 1972-05-09 | John S Wright | Overhead visual shutter device |
DE7013649U (de) * | 1970-04-09 | 1970-08-20 | Ritzerfeld Gerhard | Schreibprojektor. |
US3785729A (en) * | 1971-03-01 | 1974-01-15 | C Dasher | Overhead projector roller assembly |
DE2156275A1 (de) * | 1971-11-12 | 1973-05-17 | Braun Ag | Folienkassette fuer schreibprojektoren |
GB1431542A (en) * | 1972-04-12 | 1976-04-07 | Graeme J H | Film feeding attachment for use with an overhead projector |
JPS5760323A (en) * | 1980-09-26 | 1982-04-12 | Minolta Camera Co Ltd | Exposure controlling device for copying equipment |
DE3105682A1 (de) * | 1981-02-17 | 1982-11-25 | Pelikan Informationstechnik GmbH & Co KG, 2000 Hamburg | "arbeitsprojektor" |
DE3205642A1 (de) * | 1982-02-17 | 1983-08-25 | Demolux Gmbh & Co Kg, 6070 Langen | Schreibprojektor |
DE3208723A1 (de) * | 1982-03-11 | 1983-09-22 | Demolux Gmbh & Co Kg, 6070 Langen | Schreibprojektor |
DE3233257A1 (de) * | 1982-09-08 | 1984-03-08 | Demolux Gmbh & Co Kg, 6070 Langen | Overhead-projektor |
JPS6117134A (ja) * | 1984-04-13 | 1986-01-25 | デモルツクス・ゲ−・エム・ベ−・ハ−・ウント・コンパニ−・カ−・ゲ− | オ−バ−ヘッド型プロジェクタ |
DE3425323A1 (de) * | 1984-07-10 | 1986-01-16 | Demolux | Overhead-projektor |
SE459288B (sv) * | 1987-08-24 | 1989-06-19 | Carl Eric Ohlson | Saett vid granskning av roentgenfilm och liknande samt granskningsskaap foer saadan filmgranskning |
US4942411A (en) * | 1988-06-27 | 1990-07-17 | Polston Steve A | Automatic overlay feed apparatus for an overhead projector |
US4944586A (en) * | 1989-11-30 | 1990-07-31 | E. I. Du Pont De Nemours And Company | Automated transparency organizer |
US5052798A (en) * | 1990-03-23 | 1991-10-01 | Terry L. Mardis | Highlighted module for overhead view projector |
-
1987
- 1987-12-30 FI FI875763A patent/FI88214C/fi not_active IP Right Cessation
-
1989
- 1989-06-28 WO PCT/FI1989/000124 patent/WO1991000546A1/en not_active Application Discontinuation
- 1989-06-28 US US07/778,967 patent/US5214459A/en not_active Expired - Fee Related
- 1989-06-28 EP EP89907761A patent/EP0479779A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
US5214459A (en) | 1993-05-25 |
FI88214B (fi) | 1992-12-31 |
WO1991000546A1 (en) | 1991-01-10 |
FI88214C (fi) | 1993-04-13 |
EP0479779A1 (en) | 1992-04-15 |
FI875763A (fi) | 1989-07-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM | Patent lapsed | ||
MM | Patent lapsed |
Owner name: EDUCATEK OY |