FR699743A - Improvement in photographic sound recording devices - Google Patents

Improvement in photographic sound recording devices

Info

Publication number
FR699743A
FR699743A FR699743DA FR699743A FR 699743 A FR699743 A FR 699743A FR 699743D A FR699743D A FR 699743DA FR 699743 A FR699743 A FR 699743A
Authority
FR
France
Prior art keywords
improvement
recording devices
sound recording
photographic sound
photographic
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
Simon-Gerard Israel-Kraemer
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 FR699743A publication Critical patent/FR699743A/en
Expired legal-status Critical Current

Links

FR699743D 1930-07-30 1930-07-30 Improvement in photographic sound recording devices Expired FR699743A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR699743T 1930-07-30

Publications (1)

Publication Number Publication Date
FR699743A true FR699743A (en) 1931-02-19

Family

ID=9048381

Family Applications (1)

Application Number Title Priority Date Filing Date
FR699743D Expired FR699743A (en) 1930-07-30 1930-07-30 Improvement in photographic sound recording devices

Country Status (1)

Country Link
FR (1) FR699743A (en)

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