FR783916A - Improvements to projection screens - Google Patents
Improvements to projection screensInfo
- Publication number
- FR783916A FR783916A FR783916DA FR783916A FR 783916 A FR783916 A FR 783916A FR 783916D A FR783916D A FR 783916DA FR 783916 A FR783916 A FR 783916A
- Authority
- FR
- France
- Prior art keywords
- projection screens
- screens
- projection
- Prior art date
- 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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX783916X | 1934-08-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR783916A true FR783916A (en) | 1935-07-19 |
Family
ID=19743044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR783916D Expired FR783916A (en) | 1934-08-21 | 1935-01-08 | Improvements to projection screens |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR783916A (en) |
-
1935
- 1935-01-08 FR FR783916D patent/FR783916A/en not_active Expired
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