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. 15, 1979
Filed:
Dec. 18, 1972
Applicant:
Inventors:
Hiroshi Muraoka, Tokyo, JP;
Teruo Tohma, Tokyo, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ; G11B / ; B24B / ;
U.S. Cl.
CPC ...
360112 ; 360122 ; 29603 ; 5116577 ; 5128 / ;
Abstract
A magnetic head having one or more magneto-electric converting elements, such as Hall elements, and comprising plural leads which are used, when the magnetic head is manufactured, for measuring the amount of head material ground away between a front surface of the magnetic head and the front edge of the magneto-electric converting element in order to control a two-stage grinding operation on the head.