FR818965A - Ecran de projection - Google Patents
Ecran de projectionInfo
- Publication number
- FR818965A FR818965A FR818965DA FR818965A FR 818965 A FR818965 A FR 818965A FR 818965D A FR818965D A FR 818965DA FR 818965 A FR818965 A FR 818965A
- 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 |
---|---|---|---|
DE818965X | 1936-06-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR818965A true FR818965A (fr) | 1937-10-07 |
Family
ID=6735563
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR818965D Expired FR818965A (fr) | 1936-06-17 | 1937-03-09 | Ecran de projection |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR818965A (fr) |
-
1937
- 1937-03-09 FR FR818965D patent/FR818965A/fr not_active Expired
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