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:
Dec. 01, 1992
Filed:
Oct. 15, 1990
Applicant:
Inventor:
Peter L Winship, Albany, CA (US);
Assignee:
Teknekron Communications Systems, Inc., Berkeley, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324671 ; 324606 ; 324684 ;
Abstract
Two capacitive sensors are positioned on opposite sides of the sheet material, having their outputs connected additively. The output of the capacitive sensors is then supplied to a comparator to which a known reference voltage is also supplied. An adaptive circuit adaptively changes the reference voltage.