FR54843E - écran pour projection - Google Patents
écran pour projectionInfo
- Publication number
- FR54843E FR54843E FR54843DA FR54843E FR 54843 E FR54843 E FR 54843E FR 54843D A FR54843D A FR 54843DA FR 54843 E FR54843 E FR 54843E
- 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
- G03B21/60—Projection screens characterised by the nature of the surface
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR54843T | 1946-11-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR54843E true FR54843E (fr) | 1950-08-02 |
Family
ID=8689259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR54843D Expired FR54843E (fr) | 1946-11-15 | 1946-11-15 | écran pour projection |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR54843E (fr) |
-
1946
- 1946-11-15 FR FR54843D patent/FR54843E/fr not_active Expired
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