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:
Mar. 24, 1997
Applicant:
Inventors:
Don Charles McCall, Round Rock, TX (US);
David A Biedermann, Austin, TX (US);
Assignee:
Dresser Industries, Inc., Dallas, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04K / ;
U.S. Cl.
CPC ...
380 24 ; 380 23 ; 380 52 ; 380 59 ; 705 16 ; 705 18 ; 705 25 ; 710 67 ;
Abstract
A secure touchscreen is provided, comprising a touchscreen and touchscreen controller for receiving inputs, a system controller, an encryption module and two external buses. The controller, system controller and encryption module are embedded in a mass of material to prevent unauthorized access of the inputs. Furthermore, the first external bus is used to operate and communicate with an external system in an encrypted mode, while the second external bus is used to operate and communicate with the external system in a normal mode.