FR849702A - - Google Patents
Info
- Publication number
- FR849702A FR849702A FR849702DA FR849702A FR 849702 A FR849702 A FR 849702A FR 849702D A FR849702D A FR 849702DA FR 849702 A FR849702 A FR 849702A
- Authority
- FR
- France
- 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
- G03B21/20—Lamp housings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR849702A true FR849702A (ja) | 1939-11-30 |
Family
ID=1554656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR849702D Expired FR849702A (ja) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR849702A (ja) |
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0
- FR FR849702D patent/FR849702A/fr not_active Expired