FR900533A - Appareil de projection - Google Patents
Appareil de projectionInfo
- Publication number
- FR900533A FR900533A FR900533DA FR900533A FR 900533 A FR900533 A FR 900533A FR 900533D A FR900533D A FR 900533DA FR 900533 A FR900533 A FR 900533A
- Authority
- FR
- France
- Prior art keywords
- projection device
- projection
- 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
- G03B21/10—Projectors with built-in or built-on screen
- G03B21/11—Projectors with built-in or built-on screen for microfilm reading
- G03B21/111—Projectors with built-in or built-on screen for microfilm reading of roll films
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US900533XA | 1940-04-13 | 1940-04-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR900533A true FR900533A (fr) | 1945-07-02 |
Family
ID=22221049
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR900533D Expired FR900533A (fr) | 1940-04-13 | 1943-12-13 | Appareil de projection |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR900533A (fr) |
-
1943
- 1943-12-13 FR FR900533D patent/FR900533A/fr not_active Expired
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