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:
Apr. 15, 1980
Filed:
Jan. 05, 1978
William Pepper, Jr, Bethesda, MD (US);
Peptek, Inc., Bethesda, MD (US);
Abstract
A system is described for coupling two voltage sources to a resistive plane, surface or layer so as to produce a uniform electric field in said plane with orthogonal components along the two axes of the plane generated by the two voltage sources so that coordinates of position of a digit or finger in the field may be determined. Techniques are described for fabricating both the plane and the coupling elements from the same resistive material. It is also shown how nonlinear electric fields can be created while preserving orthogonality. Three-dimensional fields of predetermined characteristics can be created by extending the techniques to curved surfaces and by using multiple surfaces.