Dynamic magnetic information storage or retrieval – General recording or reproducing – Recording-or erasing-prevention
Patent
1986-06-20
1992-02-04
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Recording-or erasing-prevention
360 744, G11B 1504, G11B 1548
Patent
active
050863584
ABSTRACT:
An apparatus for recording and reproducing information signals on and from a recording medium is arranged to cancel out an instruction for recording an information signal if some information signal has already been recorded on the medium.
REFERENCES:
patent: 3588375 (1971-06-01), Martin
patent: 4517611 (1985-05-01), Kimura
patent: 4679101 (1987-07-01), Tezuka
Fukatsu Tsutomu
Kashida Motokazu
Masui Toshiyuki
Nagasawa Kenichi
Takahashi Koji
Canney Vincent P.
Canon Kabushiki Kaisha
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