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:
Nov. 13, 1984
Filed:
Jan. 15, 1982
Applicant:
Inventors:
Hartvig E Melbye, Boulder, CO (US);
George V Jacoby, Los Altos, CA (US);
Assignee:
Sperry Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 40 ; 360 39 ;
Abstract
A saturated flux equivalent to three amplitude level recording is attained by recording two levels by conventional saturation of the medium and the third level by writing a high frequency which erases old data and is read back as a zero level due to limited playback or read frequency response.