FR604017A - - Google Patents
Info
- Publication number
- FR604017A FR604017A FR604017DA FR604017A FR 604017 A FR604017 A FR 604017A FR 604017D A FR604017D A FR 604017DA FR 604017 A FR604017 A FR 604017A
- 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
- G03B21/18—Fire preventing or extinguishing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR604017A true FR604017A (xx) | 1926-04-28 |
Family
ID=1540556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR604017D Expired FR604017A (xx) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR604017A (xx) |
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0
- FR FR604017D patent/FR604017A/fr not_active Expired