FR723435A - Improvements to cameras for photographic sound recording - Google Patents

Improvements to cameras for photographic sound recording

Info

Publication number
FR723435A
FR723435A FR723435DA FR723435A FR 723435 A FR723435 A FR 723435A FR 723435D A FR723435D A FR 723435DA FR 723435 A FR723435 A FR 723435A
Authority
FR
France
Prior art keywords
cameras
sound recording
photographic sound
photographic
recording
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Application granted granted Critical
Publication of FR723435A publication Critical patent/FR723435A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
FR723435D 1930-10-11 1931-09-29 Improvements to cameras for photographic sound recording Expired FR723435A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US723435XA 1930-10-11 1930-10-11

Publications (1)

Publication Number Publication Date
FR723435A true FR723435A (en) 1932-04-08

Family

ID=22106989

Family Applications (1)

Application Number Title Priority Date Filing Date
FR723435D Expired FR723435A (en) 1930-10-11 1931-09-29 Improvements to cameras for photographic sound recording

Country Status (1)

Country Link
FR (1) FR723435A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE938153C (en) * 1952-10-26 1956-01-26 Siemens Ag Optical sound film optics with observation device for film and slit image

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE938153C (en) * 1952-10-26 1956-01-26 Siemens Ag Optical sound film optics with observation device for film and slit image

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