FR731359A - Magnification device - Google Patents
Magnification deviceInfo
- Publication number
- FR731359A FR731359A FR731359DA FR731359A FR 731359 A FR731359 A FR 731359A FR 731359D A FR731359D A FR 731359DA FR 731359 A FR731359 A FR 731359A
- Authority
- FR
- France
- Prior art keywords
- magnification device
- magnification
- Prior art date
- 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
- G03B21/06—Projectors or projection-type viewers; Accessories therefor affording only episcopic projection
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR731359T | 1932-02-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR731359A true FR731359A (en) | 1932-09-02 |
Family
ID=9117972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR731359D Expired FR731359A (en) | 1932-02-13 | 1932-02-13 | Magnification device |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR731359A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2468935A (en) * | 1945-01-25 | 1949-05-03 | Marful Specialties Inc | Photographic apparatus for reproduction by direct or reflected light beams |
FR2561406A1 (en) * | 1984-03-13 | 1985-09-20 | Chebbah Akli | Back-projection system |
-
1932
- 1932-02-13 FR FR731359D patent/FR731359A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2468935A (en) * | 1945-01-25 | 1949-05-03 | Marful Specialties Inc | Photographic apparatus for reproduction by direct or reflected light beams |
FR2561406A1 (en) * | 1984-03-13 | 1985-09-20 | Chebbah Akli | Back-projection system |
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