Computer with improved keyboard password functions
CA 2004485 C · Owner: Brasher, Gary L. · Inventors: Kaiser, Roger A. Jr.; Brasher, Gary L.; Nuckols, James H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A computer having an improved keyboard/auxiliary device interface controller which supports the selective restriction of user interaction with the, computer system, while maintaining the full internal functionality of the host/peripheral interface. A "password lock mode" of the improved controller prevents users from gaining unauthorized access to the computer system but, still application and operating system software can continue to issue commands to and receive responses from the otherwise disabled peripheral devices. The improved controller does not require modification to the conventional keyboard/auxiliary device hardware.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed December 4, 1989 and granted February 29, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 4, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.