FR742983A - - Google Patents
Info
- Publication number
- FR742983A FR742983A FR742983DA FR742983A FR 742983 A FR742983 A FR 742983A FR 742983D A FR742983D A FR 742983DA FR 742983 A FR742983 A FR 742983A
- Authority
- FR
- France
- 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
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- 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)
Publications (1)
Publication Number | Publication Date |
---|---|
FR742983A true FR742983A (es) | 1933-03-21 |
Family
ID=1547305
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR742983D Expired FR742983A (es) |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR742983A (es) |
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0
- FR FR742983D patent/FR742983A/fr not_active Expired