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Primary Examiner: Griffin, Robert L.
Assistant Examiner: Stellar, George G.
Attorney: Spencer & Kaye

Next ten patents ordered by date:

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Title: Record carrier, method of producing the record carrier and method for reproducing stored signal therefrom

Abstract: A method of producing a record carrier with stored signals thereon and the record made thereby. The method comprises applying to a flexible record carrier hill and dale undulations which correspond to a broadband signal in the form of a frequency modulated carrier frequency oscillation, further applying at least one further signal of lower frequency superimposed on the broadband signal, and selecting an amplitude for the further signal such that in playback of the stored signals by a skid-shaped pickup operating by compression of the hills, even the lowest hills contact the skid-shaped pickup and are compressed thereby.

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Other info:

Inventors: Thuy, Hans-Joachim (Berlin, DT)
Dickopp, Gerhard (Berlin, DT)

Application Number: 437047
Filing Date: 1974-01-28
Publication_date: 1976-02-03
Assignee: TED Bildplatten Aktiengesellschaft, AEG-Telefunken, TELDEC (Zug, CH)
Primary Class(es): 386/27 346/77R, 369/61, 369/62, 369/130, 386/39
Other Classes:
US Patent Ref:

3626087	Dec, 1971	Tomioka	178/5.
3652809	Mar, 1972	Dickopp et al.	179/100.

Other Refs: Other References: "Audio, Etc. - The Visible LP," E. T. Canby, Audio, June 1968, pp. 10 and 12.