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:
Apr. 10, 1990
Filed:
Jul. 14, 1989
Kiyonobu Endo, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
This specification discloses a card-like optical information recording medium comprising a card-like base body, and concentric circular or spiral information tracks provided on the base body and capable of optically recording and/or reproducing information thereon. The specification also discloses an apparatus for recording and/or reproducing information on such card-like optical information recording medium which comprises a turn table rotatable with the card-like medium being placed thereon, a clamp mechanism for positioning and fixing the card-like medium on the turn table, and an optical head for applying a light beam to the card-like medium while moving radially of the rotation, thereby effecting recording and/or reproduction of information concentrically or spirally.