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:
Sep. 14, 1999
Filed:
Nov. 24, 1997
Akio Takatsuka, Hiratsuka, JP;
Hideaki Amano, Odawara, JP;
Katsuhiro Tsuneta, Odawara, JP;
Toshiaki Tsuyoshi, Odawara, JP;
Tetsuji Kameoka, Odawara, JP;
Haruhiko Hosokawa, Odawara, JP;
Takashi Yamaguchi, Tsuchiura, JP;
Kazuyoshi Hanada, Hadano, JP;
Satoru Yamaura, Odawara, JP;
Toshio Matsushita, Kanagawa-ken, JP;
Toshihisa Okazaki, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magnetic disk apparatus includes a dual head equipped with an MR head for reading data and an inductive head for writing the data. One ID portion and one servo pattern are disposed in one sector and an unequal track pitch is formed. The ID portion is formed at the center of a radius of two positions to which the MR head is positioned at the time of reading the data and writing the data, respectively.