The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 1978
Filed:
Oct. 02, 1975
Masao Iwaoka, Tokyo, JA;
Yosuke Igeta, Tokyo, JA;
Toyochika Kiku, Tokyo, JA;
Fumio Kobayashi, Tokyo, JA;
Tatsuhiko Sugai, Tokyo, JA;
Gakken Co., Ltd., Tokyo, JA;
Abstract
Recording-reproducing apparatus utilizing as the recording medium a rectangular sheet of paper or the like having a spiral magnetic track on one surface and printed material on the opposite surface for audiovisual educational purposes. For electrically controlling the operation of the apparatus, switches for playback, recording, stop and backspacing operations are connected to a reversible drive motor via a control circuit comprising a relay with a plurality of relay contact sets. The control circuit includes means for automatically suspending the rotation of the drive motor in response to a stop signal generated when, during playback, the magnetic head reaches a specific zone or zones on the track.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile