FR56839E - Perfectionnement aux appareils photographiques - Google Patents

Perfectionnement aux appareils photographiques

Info

Publication number
FR56839E
FR56839E FR56839DA FR56839E FR 56839 E FR56839 E FR 56839E FR 56839D A FR56839D A FR 56839DA FR 56839 E FR56839 E FR 56839E
Authority
FR
France
Prior art keywords
cameras
further training
training
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
Application number
Other languages
English (en)
Inventor
Lucien-Jules-Emile-A Dodin
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR56839E publication Critical patent/FR56839E/fr
Expired legal-status Critical Current

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)
FR56839D 1947-06-27 1947-06-27 Perfectionnement aux appareils photographiques Expired FR56839E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR56839T 1947-06-27

Publications (1)

Publication Number Publication Date
FR56839E true FR56839E (fr) 1952-10-07

Family

ID=8690978

Family Applications (1)

Application Number Title Priority Date Filing Date
FR56839D Expired FR56839E (fr) 1947-06-27 1947-06-27 Perfectionnement aux appareils photographiques

Country Status (1)

Country Link
FR (1) FR56839E (fr)

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