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:
Oct. 19, 1999
Filed:
Jul. 10, 1998
Applicant:
Inventors:
Kevin G Leeper, Angus, GB;
Kenneth Kelly, Dundee, GB;
Assignee:
NCR Corporation, Dayton, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
235380 ; 235375 ; 200 / ; 200 / ; 3404071 ; 3404072 ;
Abstract
A keyboard includes a keyboard membrane where the membrane comprises a top layer, a spacer layer and a bottom layer. The spacer layer has interconnecting voids that are connected to the atmosphere by a common vent. A patch made of a hydrophobic material prevents water entering the keyboard membrane via the vent, but allows the air pressure inside the voids to remain balanced with the atmospheric air pressure.