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. 10, 1983
Filed:
Nov. 04, 1980
Masanori Isshiki, Yokohama, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A perpendicular magnetic recording head is disclosed which includes a block core of a high magnetic permeability material having a side surface substantially perpendicular to a magnetic surface of a magnetic tape moving relative to it, a thin film core including a magnetic thin film of a high magnetic permeability material, the thin film core being secured to the side surface of the block core and having a width smaller than the width of the block core, the thin film core having a pole section extending from said side surface of the block core substantially perpendicularly to the magnetic surface and in contact therewith at the end, and an exciting coil wound on the block core and thin film core.