FR696821A - - Google Patents
Info
- Publication number
- FR696821A FR696821A FR696821DA FR696821A FR 696821 A FR696821 A FR 696821A FR 696821D A FR696821D A FR 696821DA FR 696821 A FR696821 A FR 696821A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/606—Projection screens characterised by the nature of the surface for relief projection
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR696821A true FR696821A (en) | 1931-01-07 |
Family
ID=1544153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR696821D Expired FR696821A (en) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR696821A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3136211A (en) * | 1961-11-27 | 1964-06-09 | Dale E Wretlind | Projected media screen |
| US3460882A (en) * | 1965-10-23 | 1969-08-12 | Ardell J Abrahamson | Wide-angle single picture system for vision in depth |
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0
- FR FR696821D patent/FR696821A/fr not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3136211A (en) * | 1961-11-27 | 1964-06-09 | Dale E Wretlind | Projected media screen |
| US3460882A (en) * | 1965-10-23 | 1969-08-12 | Ardell J Abrahamson | Wide-angle single picture system for vision in depth |