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:
Jul. 27, 2004
Filed:
Mar. 27, 2002
Blaine C. Readler, San Diego, CA (US);
Other;
Abstract
Method and apparatus for disabling the operation of a computer keyboard with respect to depressed keys as they are observed by the computer's CPU. Entry into, and exit from, the keyboard disabled state is made via specific, simultaneous combinations of depressed keys. In one embodiment of the invention a new software routing ( ) is added to the existing keyboard software ( ) to recognize specific, simultaneous combinations of depressed keys and alternately inhibit or allow transmissions from the keyboard to the computer CPU in response to depressed keyboard keys. In an alternate embodiment an apparatus ( ) is added between an existing keyboard and the computer to similarly recognize specific, simultaneous combinations of depressed keys via a lock detection function ( ) which alternately inhibits or allows transmission of keyboard clock ( ) and data ( ) signals, thus preventing depressed keyboard keys from being recognized by the computer CPU.