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:
Mar. 17, 1987
Filed:
Jan. 11, 1985
Applicant:
Inventors:
Hiroshi Ohta, Komoro, JP;
Kinji Sasaki, Hita, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428328 ; 428694 ; 428900 ; 427128 ;
Abstract
A magnetic recording medium having a magnetic layer comprising ferromagnetic powder particles dispersed in a binder, wherein the ferromagnetic powder particles satisfy the condition represented by T<600.times.10.sup.3 nm.sup.3 where T is an average value of volume T.sub.1 of each particle, where T.sub.1 is represented by T.sub.1 =L(nm).times.W(nm).times.W(nm) where L is the length of each particle and W is the width thereof, and the skewness in the distribution of the length L is at most 0.4.