FR717905A - Improvements to sound cinematography projectors - Google Patents

Improvements to sound cinematography projectors

Info

Publication number
FR717905A
FR717905A FR717905DA FR717905A FR 717905 A FR717905 A FR 717905A FR 717905D A FR717905D A FR 717905DA FR 717905 A FR717905 A FR 717905A
Authority
FR
France
Prior art keywords
cinematography
projectors
sound
sound cinematography
cinematography projectors
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
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 by Electrical Research Products Inc filed Critical Electrical Research Products Inc
Application granted granted Critical
Publication of FR717905A publication Critical patent/FR717905A/en
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
    • G03B31/00—Associated working of cameras or projectors with sound-recording or sound-reproducing means
    • G03B31/02—Associated working of cameras or projectors with sound-recording or sound-reproducing means in which sound track is on a moving-picture film

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR717905D 1930-05-31 1931-05-29 Improvements to sound cinematography projectors Expired FR717905A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US717905XA 1930-05-31 1930-05-31

Publications (1)

Publication Number Publication Date
FR717905A true FR717905A (en) 1932-01-16

Family

ID=22103618

Family Applications (1)

Application Number Title Priority Date Filing Date
FR717905D Expired FR717905A (en) 1930-05-31 1931-05-29 Improvements to sound cinematography projectors

Country Status (1)

Country Link
FR (1) FR717905A (en)

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