FR709330A - Improvements in sound recordings and their production processes - Google Patents

Improvements in sound recordings and their production processes

Info

Publication number
FR709330A
FR709330A FR709330DA FR709330A FR 709330 A FR709330 A FR 709330A FR 709330D A FR709330D A FR 709330DA FR 709330 A FR709330 A FR 709330A
Authority
FR
France
Prior art keywords
production processes
sound recordings
recordings
sound
processes
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 FR709330A publication Critical patent/FR709330A/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
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
FR709330D 1929-12-18 1930-12-13 Improvements in sound recordings and their production processes Expired FR709330A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US414878A US1855196A (en) 1929-12-18 1929-12-18 Sound reproduction

Publications (1)

Publication Number Publication Date
FR709330A true FR709330A (en) 1931-08-05

Family

ID=23643375

Family Applications (1)

Application Number Title Priority Date Filing Date
FR709330D Expired FR709330A (en) 1929-12-18 1930-12-13 Improvements in sound recordings and their production processes

Country Status (5)

Country Link
US (1) US1855196A (en)
CH (1) CH156796A (en)
DE (1) DE754328C (en)
FR (1) FR709330A (en)
GB (1) GB369276A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2527463A (en) * 1946-03-29 1950-10-24 Rca Corp Multicolored record and reproducing system therefor
US2691696A (en) * 1950-10-27 1954-10-12 Eastman Kodak Co Electrooptical unsharp masking in color reproduction
US3051042A (en) * 1959-05-28 1962-08-28 Kalart Co Inc Method of re-recording a sound record line and apparatus for re-recording a sound record line

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191420798A (en) * 1914-10-10 1915-09-16 Harry Benwell Stocks Improvements in Optical Phonographs.
DE397347C (en) * 1922-11-25 1924-06-20 Werner Richter Dipl Ing Device for recording sound waves by photographic means
US1623756A (en) * 1924-05-05 1927-04-05 Western Electric Co Recording and reproducing of sounds
US1675894A (en) * 1924-06-20 1928-07-03 Western Electric Co Method and apparatus for recording and reproducing sound
DE449245C (en) * 1925-09-27 1928-10-18 Siemens & Halske Akt Ges Recording method and device for sound films
FR668725A (en) * 1928-02-04 1929-11-06 Siemens Ag Method of recording and reproducing sounds

Also Published As

Publication number Publication date
CH156796A (en) 1932-08-31
US1855196A (en) 1932-04-26
DE754328C (en) 1952-10-06
GB369276A (en) 1932-03-17

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