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:
Jun. 04, 1985
Filed:
Jun. 27, 1984
Applicant:
Inventors:
Ken Hirota, Toyonaka, JP;
Yoshiaki Fujimoto, Miyazaki, JP;
Kouichi Watanabe, Miyazaki, JP;
Minoru Sugimura, Miyazaki, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ;
U.S. Cl.
CPC ...
252 6259 ; 252 626 ; 252 6262 ; 252 6263 ; 360127 ;
Abstract
A polycrystalline ferrite containing Na, Zr and Ca in amounts of 0.01 to 0.5% by weight, 0.005 to 0.5% by weight and 0.01 to 0.5% by weight respectively, in Mn-Zn or Ni-Zn ferrite to thereby enhance the toughness of said ferrite. Said ferrite is suited for a magnetic head with improved mechanical strength and excellent fine workability.