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:
May. 13, 1980
Filed:
Sep. 26, 1977
Applicant:
Inventor:
Atsushi Suzuki, Hachioji, JP;
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ; G06K / ; H03F / ; G11B / ;
U.S. Cl.
CPC ...
235491 ; 331 / ; 235468 ; 250365 ;
Abstract
A data card wherein various data are recorded with a fluorescent material which emits infrared rays when excited by infrared rays is disclosed. The data card according to this invention has such merit that it is very effective for the preservation of secrecy and the prevention of forgery, that it is not affected by stains, that different information can be recorded thereon one over the other, and that it can be read by an extraordinarily compact reader.
Suzuki, Atsushi. (1980). Data card (U.S. Patent No. 4202491). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4202491
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile