FR999390A - - Google Patents
Info
- Publication number
- FR999390A FR999390A FR999390DA FR999390A FR 999390 A FR999390 A FR 999390A FR 999390D A FR999390D A FR 999390DA FR 999390 A FR999390 A FR 999390A
- 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
- G03B21/13—Projectors for producing special effects at the edges of picture, e.g. blurring
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR999390A true FR999390A (nl) | 1952-01-31 |
Family
ID=1567326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR999390D Expired FR999390A (nl) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR999390A (nl) |
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0
- FR FR999390D patent/FR999390A/fr not_active Expired