FR48291E - Improvements to episcopic devices - Google Patents
Improvements to episcopic devicesInfo
- Publication number
- FR48291E FR48291E FR48291DA FR48291E FR 48291 E FR48291 E FR 48291E FR 48291D A FR48291D A FR 48291DA FR 48291 E FR48291 E FR 48291E
- Authority
- FR
- France
- Prior art keywords
- episcopic
- devices
- episcopic devices
- 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 |
---|---|---|---|
FR48291T | 1937-03-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR48291E true FR48291E (en) | 1937-12-27 |
Family
ID=8683649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR48291D Expired FR48291E (en) | 1937-03-30 | 1937-03-30 | Improvements to episcopic devices |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR48291E (en) |
-
1937
- 1937-03-30 FR FR48291D patent/FR48291E/en not_active Expired
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