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:
Oct. 27, 1987
Filed:
Jan. 31, 1985
Applicant:
Inventors:
Assignee:
Olympus Optical Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360121 ; 360105 ;
Abstract
A perpendicular magnetic head includes a main pole suitable for use exclusively in recording information signals which is made of a soft magnetic film having the high saturation magnetization and another main pole suitable for use exclusively in reproducing recorded signals which is made of a soft magnetic film having the high initial permeability, both being disposed at separate positions.
Imamura, Tatsuo. (1987). Perpendicular magnetic head (U.S. Patent No. 4703380). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4703380
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile