FR493384A - Improvements to cinematographic devices - Google Patents
Improvements to cinematographic devicesInfo
- Publication number
- FR493384A FR493384A FR493384DA FR493384A FR 493384 A FR493384 A FR 493384A FR 493384D A FR493384D A FR 493384DA FR 493384 A FR493384 A FR 493384A
- Authority
- FR
- France
- Prior art keywords
- cinematographic
- devices
- cinematographic devices
- 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
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR493384T | 1918-11-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR493384A true FR493384A (en) | 1919-08-07 |
Family
ID=1529140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR493384D Expired FR493384A (en) | 1918-11-27 | 1918-11-27 | Improvements to cinematographic devices |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR493384A (en) |
-
1918
- 1918-11-27 FR FR493384D patent/FR493384A/en not_active Expired
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