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:
Nov. 28, 1995
Filed:
Feb. 08, 1994
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A card is composed of a reversible thermosensitive recording portion capable of recording information therein, and an irreversible recording portion capable of recording information therein. An information recording method uses the card in which an numerical information is recorded in the reversible thermosensitive recording portion, and an information which has substantially the same contents as those of the numerical information recorded in the reversible thermosensitive recording portion is recorded in the irreversible recording portion for preventing improper alternation of the numerical information recorded in the reversible thermosensitive recording portion. The numerical information recorded in the reversible thermosensitive recording portion and the information recorded in the irreversible recording portion are recognized by an optical device.