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, 1991
Filed:
Feb. 16, 1989
Applicant:
Inventor:
Peter J Vogelgesang, Roseville, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 13 ; 360114 ; 360 59 ;
Abstract
An apparatus for providing a bias magnetic field coincident with the read/write laser in a magneto-optic recording system is disclosed, with special utility for systems wherein the thickness or configuration of the media necessitates a functioning bias magnet being located on the same side of the media as the read/write laser.