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:
Mar. 02, 1982
Filed:
May. 19, 1980
David D Thornburg, Los Altos, CA (US);
Robert M Flegal, Palo Alto, CA (US);
Tat C Lam, Fremont, CA (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A graphics input device for use with location indicating means to present graphic data upon a computer controlled visual display. The device includes a pen having a housing within which is disposed a conductive stylus shaft, one end extending beyond the housing to serve as the writing tip. A cylindrical off-axis pressure transducer encircles a portion of the stylus shaft within the housing, adjacent its writing end, for generating a variable output electrical signal proportional to the variable off-axis force applied to the stylus independently of the rotational orientation of the pen. A display processing and control system receives the variable signals and modifies a visual characteristic of the graphic data in response thereto.