FR851944A - - Google Patents
Info
- Publication number
- FR851944A FR851944A FR851944DA FR851944A FR 851944 A FR851944 A FR 851944A FR 851944D A FR851944D A FR 851944DA FR 851944 A FR851944 A FR 851944A
- 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
- G03B21/10—Projectors with built-in or built-on screen
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR851944A true FR851944A (nl) | 1940-01-18 |
Family
ID=1554830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR851944D Expired FR851944A (nl) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR851944A (nl) |
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0
- FR FR851944D patent/FR851944A/fr not_active Expired