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. 24, 2002
Filed:
Aug. 23, 1999
Applicant:
Inventor:
David W. Wallace, Rosyth, GB;
Assignee:
NCR Corporation, Dayton, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 5/00 ;
U.S. Cl.
CPC ...
G09G 5/00 ;
Abstract
A surface wave touch screen) comprising a hydrophobic touch panel capable of propagating surface acoustic waves, wherein a touch on the touch panel causes a perturbation of a surface wave propagating through the region of the touch. Surface wave transducer means are coupled to the touch panel for transmitting and receiving surface acoustic waves on the panel and processing means are capable of determining the position of a touch on the panel. Use of a hydrophobic panel is advantageous in that operation of the touch screen is unaffected by moisture and so can be used in external environments.