FR468728A - Perfectionnements aux écrans de projections - Google Patents
Perfectionnements aux écrans de projectionsInfo
- Publication number
- FR468728A FR468728A FR468728A FR468728DA FR468728A FR 468728 A FR468728 A FR 468728A FR 468728 A FR468728 A FR 468728A FR 468728D A FR468728D A FR 468728DA FR 468728 A FR468728 A FR 468728A
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB468728X | 1913-02-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR468728A true FR468728A (fr) | 1914-07-13 |
Family
ID=1507249
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR468728A Expired FR468728A (fr) | 1913-02-19 | 1914-02-18 | Perfectionnements aux écrans de projections |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR468728A (fr) |
-
1914
- 1914-02-18 FR FR468728A patent/FR468728A/fr not_active Expired
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