FR874700A - Process for producing sound photographic films - Google Patents

Process for producing sound photographic films

Info

Publication number
FR874700A
FR874700A FR874700DA FR874700A FR 874700 A FR874700 A FR 874700A FR 874700D A FR874700D A FR 874700DA FR 874700 A FR874700 A FR 874700A
Authority
FR
France
Prior art keywords
photographic films
producing sound
sound photographic
producing
films
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Application granted granted Critical
Publication of FR874700A publication Critical patent/FR874700A/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
FR874700D 1941-01-18 1941-08-12 Process for producing sound photographic films Expired FR874700A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE874700X 1941-01-18

Publications (1)

Publication Number Publication Date
FR874700A true FR874700A (en) 1942-08-18

Family

ID=6816969

Family Applications (1)

Application Number Title Priority Date Filing Date
FR874700D Expired FR874700A (en) 1941-01-18 1941-08-12 Process for producing sound photographic films

Country Status (1)

Country Link
FR (1) FR874700A (en)

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