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:
Jan. 04, 1983
Filed:
May. 30, 1980
Applicant:
Inventor:
Shigeru Matsuyama, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
364736 ; 364768 ;
Abstract
A calculator which adds or subtracts input numerical data to or from the content of a first register in response to an actuation of an addition or subtraction key, stores the result of the addition or subtraction in the first register, further adds or subtracts the above-mentioned input numerical data to or from the content of a second register determined by the number of actuations of the addition or subtraction key, and stores the result of the latter addition or subtraction into the second register.