Operation prohibition device for an audio instrument

Details Operation prohibition device for an audio instrument Operation prohibition device for an audio instrument

1983-09-26

1987-12-01

Psitos, Aristotelis M.

Dynamic information storage or retrieval

Combined independent audio systems

Radio

455344, H04B 120

Patent

active

047109076

ABSTRACT:
This invention relates to an operation prohibition device for an audio instrument such as a tape recorder. The operation prohibition device prohibits the audio instrument from being operated by operating switches when predetermined prohibition conditions are met and releases the prohibition state of the audio instrument in response to input of a correct predetermined coded number.

REFERENCES:
patent: 3612777 (1971-10-01), Ban
patent: 4277651 (1981-07-01), Fisher, II et al.
patent: 4332982 (1982-06-01), Thomas
patent: 4392218 (1983-07-01), Plunkett, Jr.
patent: 4464678 (1984-08-01), Schiff et al.
patent: 4481512 (1984-11-01), Tscheulin et al.
patent: 4510623 (1985-04-01), Bonneau et al.
Nakamichi Mobile Sound System--7D-1200/PA- 300/SP-400--Brochure in Examiners Library.
GMBH Article--Tech. Recitt., vol. 57, No. 6, 1979, pp. 222-226, copy in 369-6.

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