FR725604A - Sound projection device - Google Patents

Sound projection device

Info

Publication number
FR725604A
FR725604A FR725604DA FR725604A FR 725604 A FR725604 A FR 725604A FR 725604D A FR725604D A FR 725604DA FR 725604 A FR725604 A FR 725604A
Authority
FR
France
Prior art keywords
projection device
sound projection
sound
projection
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)
Inventor
Alejandro Ruiz
Lucien Chanal
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 FR725604A publication Critical patent/FR725604A/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
FR725604D 1931-09-01 1931-09-01 Sound projection device Expired FR725604A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR725604T 1931-09-01

Publications (1)

Publication Number Publication Date
FR725604A true FR725604A (en) 1932-05-14

Family

ID=9110174

Family Applications (1)

Application Number Title Priority Date Filing Date
FR725604D Expired FR725604A (en) 1931-09-01 1931-09-01 Sound projection device

Country Status (1)

Country Link
FR (1) FR725604A (en)

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