FR580064A - Improvements to negatoscopes - Google Patents
Improvements to negatoscopesInfo
- Publication number
- FR580064A FR580064A FR580064DA FR580064A FR 580064 A FR580064 A FR 580064A FR 580064D A FR580064D A FR 580064DA FR 580064 A FR580064 A FR 580064A
- Authority
- FR
- France
- Prior art keywords
- negatoscopes
- 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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/02—Viewing or reading apparatus
- G02B27/022—Viewing apparatus
- G02B27/024—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR580064T | 1924-04-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR580064A true FR580064A (en) | 1924-10-29 |
Family
ID=8956541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR580064D Expired FR580064A (en) | 1924-04-11 | 1924-04-11 | Improvements to negatoscopes |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR580064A (en) |
-
1924
- 1924-04-11 FR FR580064D patent/FR580064A/en not_active Expired
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