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, 1999
Filed:
Apr. 11, 1997
Applicant:
Inventor:
James S Prater, Fort Collins, CO (US);
Assignee:
Hyundai Electronics America, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08C / ;
U.S. Cl.
CPC ...
178 1906 ; 178 1901 ; 345179 ;
Abstract
An electrostatic pen is disclosed wherein the pen's tablet engaging tip is both electrically conductive and flexible, thus providing an increasing tip contact area to a digitizing tablet as the tip of the manually held pen is pressed downward onto the tablet's top insulating layer. A signal source and signal detector are connected in series between the pen tip and the tablet's lower conductive layer. The increased contact area of the tip increases the capacitance between the tip and the tablet's lower conductive layer, thus improving the signal to noise ratio of the detected signal.