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. 07, 1992
Filed:
Sep. 28, 1989
Applicant:
Inventor:
Bryan K Clark, Sunnyvale, CA (US);
Assignee:
Tandy Corporation, Fort Worth, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ; G01D / ;
U.S. Cl.
CPC ...
369284 ; 369283 ; 369286 ; 3692752 ; 3461351 ; 346 / ; 365120 ; 365126 ; 430945 ;
Abstract
Recordable/erasable optical storage media are disclosed. More particularly, it provides a method and apparatus for recording and erasing information on an optical storage medium. The medium of the present invention generally includes a rigid substrate and an active region or layer adjacent to the substrate. The active region is a single polymer layer that functions as both an expansion layer and a retention layer. Reflective and protective layers may or may not be present. Additionally, methods for writing and erasing on these media are described.