FR654253A - Improvements in phonophotographic processes to record and reproduce sound - Google Patents

Improvements in phonophotographic processes to record and reproduce sound

Info

Publication number
FR654253A
FR654253A FR654253DA FR654253A FR 654253 A FR654253 A FR 654253A FR 654253D A FR654253D A FR 654253DA FR 654253 A FR654253 A FR 654253A
Authority
FR
France
Prior art keywords
phonophotographic
record
processes
reproduce sound
reproduce
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
Byron E Eldred
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 FR654253A publication Critical patent/FR654253A/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
    • G11B7/28—Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers
FR654253D 1927-10-07 1927-10-07 Improvements in phonophotographic processes to record and reproduce sound Expired FR654253A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR654253T 1927-10-07

Publications (1)

Publication Number Publication Date
FR654253A true FR654253A (en) 1929-04-04

Family

ID=9006382

Family Applications (1)

Application Number Title Priority Date Filing Date
FR654253D Expired FR654253A (en) 1927-10-07 1927-10-07 Improvements in phonophotographic processes to record and reproduce sound

Country Status (1)

Country Link
FR (1) FR654253A (en)

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