BE629406A - - Google Patents
Info
- Publication number
- BE629406A BE629406A BE629406DA BE629406A BE 629406 A BE629406 A BE 629406A BE 629406D A BE629406D A BE 629406DA BE 629406 A BE629406 A BE 629406A
- Authority
- BE
- Belgium
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
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE2042410 | 1963-03-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE629406A true BE629406A (fr) | 1900-01-01 |
Family
ID=3864795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE629406D BE629406A (fr) | 1963-03-11 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE629406A (fr) |
| CH (1) | CH405755A (fr) |
| GB (1) | GB1013484A (fr) |
| NL (1) | NL6402177A (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111251753A (zh) * | 2020-01-17 | 2020-06-09 | 深圳市凯博特科技有限公司 | 一种可擦写可投影可张贴的白板膜 |
-
0
- BE BE629406D patent/BE629406A/xx unknown
-
1964
- 1964-03-04 NL NL6402177A patent/NL6402177A/xx unknown
- 1964-03-04 CH CH274964A patent/CH405755A/fr unknown
- 1964-03-09 GB GB9843/64A patent/GB1013484A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH405755A (fr) | 1966-01-15 |
| NL6402177A (fr) | 1964-09-14 |
| GB1013484A (en) | 1965-12-15 |