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. 21, 1986
Filed:
Mar. 08, 1982
Alan C Mortensen, Loveland, CO (US);
Bradley W Miller, Loveland, CO (US);
Franklin T Hickenlooper, Loveland, CO (US);
David C Uhlrich, Loveland, CO (US);
Marl D Godfrey, Loveland, CO (US);
Douglas M Clifford, Loveland, CO (US);
Rex L James, Loveland, CO (US);
Robert E Watson, Loveland, CO (US);
John C Keith, Loveland, CO (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
An electronic calculator includes modular read-write and read-only memory units, a central processing unit, an output display unit, an output printer unit, a keyboard input unit, and input/output interface circuitry for facilitating the connection of one or more peripheral input/output units, such as an X-Y plotter, for example, to the calculator. When the calculator is coupled to an X-Y plotter, the user may employ commands entered from the keyboard input unit to move the plotter pen to an arbitrary position on the plotter platen whose X and Y coordinates are unknown to him and to subsequently cause the calculator to determine and display the X and Y coordinates of that arbitrary pen position.