System and method of protecting integrity of computer data and software
CA 2002240 C · Owner: Lentz, Stephen A. · Inventors: Lentz, Stephen A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
System and method for preventing alteration of stored data by computer virus. In a computer system which normally automatically boots and operating system when the central processing unit is initialized, a device is provided which takes control of the central processing unit before boot-up checks the system files for computer virus and generates an alarm signal if a virus is detected. In the preferred embodiment the device quarantines an, infected operating system to prevent alteration. -1-
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 November 3, 1989 and granted May 17, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 3, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 3, 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.