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:
Mar. 20, 2012
Filed:
May. 18, 2009
Applicants:
Akio Ogawa, Tokyo, JP;
Tsutomu Chikamatsu, Tokyo, JP;
Kazuyuki Kobayashi, Tokyo, JP;
Haruhiko Yamaguchi, Tokyo, JP;
Kazunori Matsuiwa, Tokyo, JP;
Masaki Ohashi, Yokohama, JP;
Kazuyoshi Nakajima, Yokohama, JP;
Kiyotaka Shindo, Yokohama, JP;
Inventors:
Akio Ogawa, Tokyo, JP;
Tsutomu Chikamatsu, Tokyo, JP;
Kazuyuki Kobayashi, Tokyo, JP;
Haruhiko Yamaguchi, Tokyo, JP;
Kazunori Matsuiwa, Tokyo, JP;
Masaki Ohashi, Yokohama, JP;
Kazuyoshi Nakajima, Yokohama, JP;
Kiyotaka Shindo, Yokohama, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 33/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
The characteristics of thin-film magnetic heads are evaluated by measuring, in a step and repeat method and apparatus, the magnetic field generated by the respective heads in a bar including multiple heads.