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. 07, 1992
Filed:
Sep. 27, 1989
Kanji Kawakami, Mito, JP;
Yokuo Saitoh, Kaiseimachi, JP;
Tetsuo Kobayashi, Oimachi, JP;
Takayoshi Ohtsu, Odawara, JP;
Hiroshi Fukui, Hitachi, JP;
Yamagata, deceased, Koji, late of Yokohama, JP;
by Tetsuji Yamagata, legal representative, Yokohama, JP;
by Reiko Yamagata, legal representative, Yokahama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A compound magnetic head includes first and second magnetic poles arranged to face each other to define a recording gap therebetween, a magnetic film arranged between the first and second magnetic poles, a first non-magnetic film arranged between the first magnetic pole and the magnetic film to define a first reproducing gap therebetween, and a second non-magnetic film arranged between the second magnetic pole and the magnetic pole to define a second reproducing gap therebetween. The recording gap and the first and second reproducing gaps have the same width and a common center line of the gap widths parallel to the direction of movement of a magnetic recording medium.