SE374437B - - Google Patents
Info
- Publication number
- SE374437B SE374437B SE1368672A SE1368672A SE374437B SE 374437 B SE374437 B SE 374437B SE 1368672 A SE1368672 A SE 1368672A SE 1368672 A SE1368672 A SE 1368672A SE 374437 B SE374437 B SE 374437B
- Authority
- SE
- Sweden
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)
- Overhead Projectors And Projection Screens (AREA)
- Drawing Aids And Blackboards (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19717140691 DE7140691U (de) | 1971-10-22 | 1971-10-22 | Arbeitsplatte bzw. schreibplatte fuer einen schreibprojektor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE374437B true SE374437B (enExample) | 1975-03-03 |
Family
ID=6624769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1368672A SE374437B (enExample) | 1971-10-22 | 1972-10-23 |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE788185A (enExample) |
| CH (1) | CH541819A (enExample) |
| DE (1) | DE7140691U (enExample) |
| FR (1) | FR2157559A5 (enExample) |
| GB (1) | GB1363026A (enExample) |
| NL (1) | NL7212063A (enExample) |
| SE (1) | SE374437B (enExample) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5879731U (ja) * | 1981-11-26 | 1983-05-30 | ソニー株式会社 | リアプロジエクタ装置 |
-
1971
- 1971-10-22 DE DE19717140691 patent/DE7140691U/de not_active Expired
-
1972
- 1972-08-24 GB GB3948972A patent/GB1363026A/en not_active Expired
- 1972-08-30 CH CH1278872A patent/CH541819A/de not_active IP Right Cessation
- 1972-08-30 BE BE788185A patent/BE788185A/xx unknown
- 1972-09-05 NL NL7212063A patent/NL7212063A/xx unknown
- 1972-10-18 FR FR7236868A patent/FR2157559A5/fr not_active Expired
- 1972-10-23 SE SE1368672A patent/SE374437B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE788185A (fr) | 1972-12-18 |
| NL7212063A (enExample) | 1973-04-25 |
| DE7140691U (de) | 1972-01-27 |
| FR2157559A5 (enExample) | 1973-06-01 |
| CH541819A (de) | 1973-09-15 |
| GB1363026A (en) | 1974-08-14 |