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:
Jul. 18, 1989
Filed:
Sep. 16, 1986
Makoto Shiho, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A magnetooptical information recording apparatus is provided with a device for irradiating a magnetooptical recording medium with a light beam, and a device for applying a bias magnetic field to a portion, irradiated by the light beam, of the magnetooptical recording medium. The applying device is provided with a yoke member having a first projecting portion positioned in the vicinity of the irradiated portion and a second projecting portion spaced from the first projecting portion in a direction along the surface of the recording medium, wherein the distance of the second projecting portion from the first projecting portion at a closer side to the recording medium is smaller than that at a farther side to the recording medium.