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:
Jul. 27, 1993
Filed:
Sep. 05, 1990
Applicant:
Inventor:
Kazuhiko Itoh, Tokyo, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06M / ;
U.S. Cl.
CPC ...
364550 ; 377 26 ;
Abstract
A counter has an electrically erasable and programmable read-only memory (EEPROM), a write circuit, and a read circuit. The EEPROM, which can be rewritten at least V times, is divided into count areas M.sub.O, . . . , M.sub.N each capable of storing count values from zero to V, and a number area for storing a number K from zero to N identifying the count area currently in use. The write circuit uses the count areas M.sub.O, . . . , M.sub.N in succession to store counts as high as N.times.V. The read circuit obtains the current count value by reading K from the number area, reading the contents C of the Kth count area M.sub.K, and calculating C+(V.times.K).