CH566568A5 - - Google Patents
Info
- Publication number
- CH566568A5 CH566568A5 CH595574A CH595574A CH566568A5 CH 566568 A5 CH566568 A5 CH 566568A5 CH 595574 A CH595574 A CH 595574A CH 595574 A CH595574 A CH 595574A CH 566568 A5 CH566568 A5 CH 566568A5
- Authority
- CH
- Switzerland
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
- Overhead Projectors And Projection Screens (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19732333770 DE2333770A1 (de) | 1973-06-27 | 1973-06-27 | Tageslichtprojektor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH566568A5 true CH566568A5 (ru) | 1975-09-15 |
Family
ID=5885804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH595574A CH566568A5 (ru) | 1973-06-27 | 1974-05-01 |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE814852A (ru) |
| CH (1) | CH566568A5 (ru) |
| DE (1) | DE2333770A1 (ru) |
| DK (1) | DK337674A (ru) |
| FR (1) | FR2235628A5 (ru) |
| GB (1) | GB1429283A (ru) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3410002A1 (de) * | 1984-03-19 | 1985-09-19 | Demolux Gmbh & Co Kg, 6070 Langen | Overhead-projektor |
| US6497489B1 (en) * | 2001-08-29 | 2002-12-24 | Benq Corporation | Projector with guiding rib in vent |
-
1973
- 1973-06-27 DE DE19732333770 patent/DE2333770A1/de not_active Withdrawn
- 1973-12-17 FR FR7345012A patent/FR2235628A5/fr not_active Expired
-
1974
- 1974-05-01 CH CH595574A patent/CH566568A5/xx not_active IP Right Cessation
- 1974-05-10 BE BE144173A patent/BE814852A/xx unknown
- 1974-05-14 GB GB2127874A patent/GB1429283A/en not_active Expired
- 1974-06-24 DK DK337674A patent/DK337674A/da unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2333770A1 (de) | 1975-01-23 |
| FR2235628A5 (ru) | 1975-01-24 |
| BE814852A (fr) | 1974-11-18 |
| GB1429283A (en) | 1976-03-24 |
| DK337674A (ru) | 1975-02-10 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |