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:
Jun. 18, 1991
Filed:
Oct. 30, 1989
Applicant:
Inventor:
Bruce A Stephens, Corvallis, OR (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
36470907 ;
Abstract
A calculator receives fraction values directly, without requiring the user to perform mathematic operations, by use of a primary key to separate digits of the whole number, numerator and denominator. The calculator also displays fractions with a user specified denominator allowing convenient application to user needs. By reducing mental effort in entering numeric values and interpreting results of calculations, the calculator is better adapted to suit a particular user's needs.