FR1246509A - écran de projection - Google Patents
écran de projectionInfo
- Publication number
- FR1246509A FR1246509A FR816432A FR816432A FR1246509A FR 1246509 A FR1246509 A FR 1246509A FR 816432 A FR816432 A FR 816432A FR 816432 A FR816432 A FR 816432A FR 1246509 A FR1246509 A FR 1246509A
- Authority
- FR
- France
- Prior art keywords
- projection screen
- projection
- screen
- 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
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR816432A FR1246509A (fr) | 1960-01-22 | 1960-01-22 | écran de projection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR816432A FR1246509A (fr) | 1960-01-22 | 1960-01-22 | écran de projection |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1246509A true FR1246509A (fr) | 1960-11-18 |
Family
ID=8724195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR816432A Expired FR1246509A (fr) | 1960-01-22 | 1960-01-22 | écran de projection |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR1246509A (fr) |
-
1960
- 1960-01-22 FR FR816432A patent/FR1246509A/fr not_active Expired
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