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:
Mar. 26, 1991
Filed:
Dec. 20, 1989
Toru Shinagawa, Toride, JP;
Hitachi Maxell, Ltd., Osaka, JP;
Abstract
A secret information collation method is used between electronic apparatuses that included a portable electronic device and an information processing device. The portable electronic device can include an arithmetic processing section and a memory section for storing therein a processing program to be executed by the arithmetic processing section and first secret information. The portable electronic device collating second secret information inputted from the outside with the first secret information and performing predetermined operation in response to an operation request from the outside satisfying predetermined secret information relationship. A portable electronic device includes an arithmetic processing section and a memory section for storing therein a processing program to be executed by the arithmetic processing section and first secret information such as a secret identification number. The memory section stores a secret information input processing program for calling upon an external information processing device to transfer second secret information corresponding to the first secret information, and a secret information collation program.