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. 28, 1991
Filed:
Feb. 08, 1988
Takeshi Nakao, Sagamihara, JP;
Masahiro Ojima, Tokyo, JP;
Yoshinori Miyamura, Tokyo, JP;
Toyoji Okuwaki, Tokyo, JP;
Youichi Kawakubo, Tokorozawa, JP;
Yoshinori Takeuchi, Ibaraki, JP;
Yuzo Yamaguchi, Tsuchiura, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magneto-optical memory apparatus has an optical head for applying a light to a substrate of a recording medium such as a magneto-optical disk having a magneto-optical recording film formed on the substrate and continuously applying a high power laser beam in a record mode, and a floating magnetic head arranged on the opposite side of the recording medium to the side of the optical head and adapted to be kept at a substantially constant distance from the recording medium by an air pressure created between the magnetic head and the recording medium by the movement of the recording medium, for applying, in the record mode, a magnetic field which is polarity-inverted or intensity-modulated according to information to be recorded, to the magneto-optical recording film.