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:
Jan. 16, 1996
Filed:
Oct. 28, 1994
Toru Matsuda, Yokohama, JP;
Fujihiro Ito, Saitama, JP;
Yutaka Kusano, Yokohama, JP;
Kenji Makino, Yokohama, JP;
Koyo Hasegawa, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A magnetic field generator includes a base, a plurality of magnetic field generating cores formed on the base, magnetic field generating coils respectively wound around the plurality of magnetic field generating cores, a magnetic material member being disposed between adjacent twos of the plurality of magnetic field generating cores, and a drive device for driving the magnetic field generating coils. Also, a magneto-optical recording apparatus includes an optical head for irradiating a light beam to a magneto-optical recording medium and the magnetic field generator. The magnetic field generator can set the maximum modulation frequency at a higher value while ensuring a scope of the effective vertical magnetic field sufficiently and efficiently, to thereby permit multi-recording.