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:
Jan. 10, 1978
Filed:
Oct. 07, 1976
Applicant:
Inventor:
Yuji Inouye, Kawasaki, JA;
Assignee:
Fujitsu Ltd., Kawasaki, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 75 ; 360 77 ; 360 98 ; 360135 ;
Abstract
A magnetic disk storage apparatus having a servo disk and a servo transducer cooperating therewith is described. The servo disk is provided with a magnetically pre-recorded concentric arrangement comprising of an inner guard zone, a servo track zone, and an outer guard zone. The servo track zone provides information regarding both the moving speed and the position of the servo transducer; while at least one of the inner or outer guard zones provides information regarding both the moving speed and the guard zone of the servo transducer.