FR846848A - - Google Patents
Info
- Publication number
- FR846848A FR846848A FR846848DA FR846848A FR 846848 A FR846848 A FR 846848A FR 846848D A FR846848D A FR 846848DA FR 846848 A FR846848 A FR 846848A
- 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
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/58—Means for varying duration of "open" period of shutter
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR846848A true FR846848A (xx) | 1939-09-26 |
Family
ID=1554411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR846848D Expired FR846848A (xx) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR846848A (xx) |
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0
- FR FR846848D patent/FR846848A/fr not_active Expired