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:
Jun. 27, 1989
Filed:
Sep. 08, 1986
Yoshikazu Miyajima, Kawasaki, JP;
Makoto Shiho, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A magneto-optical information recording apparatus comprises an objective for condensing a light beam on a magneto-optical recording medium, a bias magnetic field producing device provided on the opposite side of the objective with respect to the magneto-optical recording medium and applying a magnetic field from outside to the magneto-optical recording medium near the condensed point of the light beam, and a protective outer frame containing the objective therein and having an opening for transmitting the light beam therethrough at a location opposed to the magneto-optical recording medium, at least a portion of the protective outer frame being formed of a ferromagnetic material.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile