FR867994A - Observation or reading and photographic reproduction apparatus - Google Patents
Observation or reading and photographic reproduction apparatusInfo
- Publication number
- FR867994A FR867994A FR867994DA FR867994A FR 867994 A FR867994 A FR 867994A FR 867994D A FR867994D A FR 867994DA FR 867994 A FR867994 A FR 867994A
- Authority
- FR
- France
- Prior art keywords
- observation
- reading
- reproduction apparatus
- photographic reproduction
- photographic
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE867994X | 1938-08-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR867994A true FR867994A (en) | 1941-12-09 |
Family
ID=6802253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR867994D Expired FR867994A (en) | 1938-08-13 | 1939-07-28 | Observation or reading and photographic reproduction apparatus |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR867994A (en) |
-
1939
- 1939-07-28 FR FR867994D patent/FR867994A/en not_active Expired
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