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. 01, 1990
Filed:
Jun. 28, 1989
Applicant:
Inventor:
Takashi Nonaka, Kamakura, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
29603 ; 29407 ; 360119 ;
Abstract
A method of manufacturing a magnetic head where the width of upper and/or lower cores projecting from respective core bodies and extending parallel with each other via a gap is changed in advance substantially stepwise toward the free end. Then, the upper and lower cores are polished from the free ends to a position of a stepwise change in the width, thus obtaining a desired throat height.