FR39060E - Improvements in the production of phonograms - Google Patents

Improvements in the production of phonograms

Info

Publication number
FR39060E
FR39060E FR39060DA FR39060E FR 39060 E FR39060 E FR 39060E FR 39060D A FR39060D A FR 39060DA FR 39060 E FR39060 E FR 39060E
Authority
FR
France
Prior art keywords
phonograms
production
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR39060E publication Critical patent/FR39060E/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
FR39060D 1930-09-19 1930-09-19 Improvements in the production of phonograms Expired FR39060E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR39060T 1930-09-19

Publications (1)

Publication Number Publication Date
FR39060E true FR39060E (en) 1931-08-26

Family

ID=8675497

Family Applications (1)

Application Number Title Priority Date Filing Date
FR39060D Expired FR39060E (en) 1930-09-19 1930-09-19 Improvements in the production of phonograms

Country Status (1)

Country Link
FR (1) FR39060E (en)

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