SE348564B - - Google Patents
Info
- Publication number
- SE348564B SE348564B SE1289368A SE1289368A SE348564B SE 348564 B SE348564 B SE 348564B SE 1289368 A SE1289368 A SE 1289368A SE 1289368 A SE1289368 A SE 1289368A SE 348564 B SE348564 B SE 348564B
- 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)
- Projection Apparatus (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US67284967A | 1967-10-04 | 1967-10-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE348564B true SE348564B (fi) | 1972-09-04 |
Family
ID=24700274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1289368A SE348564B (fi) | 1967-10-04 | 1968-09-24 |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR1586014A (fi) |
| GB (1) | GB1182901A (fi) |
| SE (1) | SE348564B (fi) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991000546A1 (en) * | 1987-12-30 | 1991-01-10 | Educatek Oy | Overhead projector |
-
1968
- 1968-09-24 SE SE1289368A patent/SE348564B/xx unknown
- 1968-10-03 GB GB4705768A patent/GB1182901A/en not_active Expired
- 1968-10-03 FR FR1586014D patent/FR1586014A/fr not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991000546A1 (en) * | 1987-12-30 | 1991-01-10 | Educatek Oy | Overhead projector |
| US5214459A (en) * | 1987-12-30 | 1993-05-25 | Educatek Oy | Overhead projectors |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1586014A (fi) | 1970-02-06 |
| GB1182901A (en) | 1970-03-04 |