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. 11, 1991
Filed:
Mar. 30, 1989
Applicant:
Inventors:
Assignee:
Rohm GmbH Chemische Fabrik, Darmstadt, DE;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
365113 ; 365119 ; 369100 ; 369101 ; 430270 ; 430 18 ; 430 19 ;
Abstract
A device for reversible optical data storage, comprising polymer film, the film comprising an amorphous polymer capable of photochromic isomerization, whereby data is reversibly stored in said polymer film and may be read by illuminating the isomerized polymer film with a light source.