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:
Feb. 28, 1989
Filed:
Jul. 29, 1987
Applicant:
Inventor:
Mitsunari Kano, Seto, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
235380 ;
Abstract
A time limiting function is incorporated in an information carrying medium such as IC card to check whether the current time traced constantly reaches a preset limit time. When the current time reaches the limit time, information to be protected and stored in a memory is erased. For convenience of the user possessing the information carry medium, a card holder is provided which can be connected to the information carrying medium to stop the time limiting function.