FR53653E - Zero-brightness projector - Google Patents
Zero-brightness projectorInfo
- Publication number
- FR53653E FR53653E FR53653DA FR53653E FR 53653 E FR53653 E FR 53653E FR 53653D A FR53653D A FR 53653DA FR 53653 E FR53653 E FR 53653E
- Authority
- FR
- France
- Prior art keywords
- zero
- brightness projector
- projector
- brightness
- 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 |
|---|---|---|---|
| FR53653T | 1944-05-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR53653E true FR53653E (en) | 1946-07-11 |
Family
ID=8688162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR53653D Expired FR53653E (en) | 1944-05-04 | 1944-05-04 | Zero-brightness projector |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR53653E (en) |
-
1944
- 1944-05-04 FR FR53653D patent/FR53653E/en not_active Expired
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