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. 30, 1976
Filed:
Sep. 11, 1974
Applicant:
Inventors:
Guy Claude Travot, Saint-Mur-des-fosses, FR;
Gerard Rene Sirand-Rey, Roissy-en-Brie, FR;
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G02B / ; G02F / ; G11C / ;
U.S. Cl.
CPC ...
360114 ; 3401 / ; 350151 ;
Abstract
A method and apparatus are disclosed for retrieving magnetically recorded information by optical means. The magnetic recording is irradiated by a beam of coherent light whose plane of polarization is periodically varied. The light which is transmitted or reflected from the recording medium is analyzed in order to retrieve the magnetically recorded information.