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:
Feb. 21, 1989
Filed:
May. 26, 1987
Applicant:
Inventor:
Blair Evans, Idlewild, MI (US);
Assignee:
Microtouch Systems, Inc., Woburn, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08C / ;
U.S. Cl.
CPC ...
178 19 ;
Abstract
A method and apparatus are disclosed for determining the location of a designated point on an electrically sensitive touch-screen surface while minimizing aberrations introduced by non-uniformity in the field applied to the surface, by attaching a plurality of field-producing discrete point electrodes to widely spaced points on the surface in a predetermined geometric pattern and by measuring the currents drawn from the point electrodes upon the capacitive touching of a designated location on the surface.