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. 26, 1984
Filed:
Feb. 06, 1981
Emil E Olander Jr, Fort Collins, CO (US);
Rex I James, Loveland, CO (US);
Ivar W Larson, Loveland, CO (US);
Wayne F Covington, Loveland, CO (US);
Jack M Walden, Loveland, CO (US);
Robert E Watson, Loveland, CO (US);
Francis J Yockey, Loveland, CO (US);
Fred Wenninger, Jr, Loveland, CO (US);
Homer C Russell, Berthoud, CO (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
An electronic calculator is provided by employing read-write and read-only memory units, a central processing unit, and an input-output control unit capable of bidirectionally transferring information between the memory or central processing units and a number of input and output units. The input and output units include a keyboard input unit and an alphanumeric display unit. The keyboard input unit includes means for entering a data entry statement into the read-write memory as part of a program of statements stored therein. The central processing unit includes logic means responsive to a data entry statement encountered during processing of a program stored in the read-write memory for controlling the alphanumeric display unit to indicate the nature of the data to be entered and thereby prompt the user as to the need for and nature of a data entry at the time such data entry is required during processing of that program.