FR765541A - Perfectionnements aux appareils photographiques - Google Patents
Perfectionnements aux appareils photographiquesInfo
- Publication number
- FR765541A FR765541A FR765541DA FR765541A FR 765541 A FR765541 A FR 765541A FR 765541D A FR765541D A FR 765541DA FR 765541 A FR765541 A FR 765541A
- Authority
- FR
- France
- Prior art keywords
- cameras
- 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
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/18—Focusing aids
- G03B13/20—Rangefinders coupled with focusing arrangements, e.g. adjustment of rangefinder automatically focusing camera
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR765541T | 1933-03-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR765541A true FR765541A (fr) | 1934-06-12 |
Family
ID=9182795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR765541D Expired FR765541A (fr) | 1933-03-04 | 1933-03-04 | Perfectionnements aux appareils photographiques |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR765541A (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2496059A (en) * | 1948-09-07 | 1950-01-31 | Macvan Mfg Company | Twin lens reflex camera |
US2718832A (en) * | 1950-06-08 | 1955-09-27 | Bolsey Jacques | Photographic reflex cameras |
-
1933
- 1933-03-04 FR FR765541D patent/FR765541A/fr not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2496059A (en) * | 1948-09-07 | 1950-01-31 | Macvan Mfg Company | Twin lens reflex camera |
US2718832A (en) * | 1950-06-08 | 1955-09-27 | Bolsey Jacques | Photographic reflex cameras |
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