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:
Aug. 17, 1993
Filed:
Dec. 04, 1991
Applicant:
Inventor:
Hirohisa Takada, Tokyo, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
235487 ; 235382 ; 235494 ; 359534 ;
Abstract
A card having retroreflective bar codes is comprised of a card substrate on which there are provided a first information recording portion formed of a retroreflective material portion of a predetermined pattern and a second information recording portion which can be read out from a nearby place. Also, a card having retroreflective bar codes is formed of recorded tracks comprised of retroreflective material portions and nonretroreflective portions which are formed on a heat distortion material formed of a retroreflective member or retroreflective material by a selective heating and distortion process in response to information to be recorded.