Security system
CA 1163004 A · Owner: Nelson, Avi N. · Inventors: Nelson, Avi N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A security system uses one electronic key that contains many key codes of the user to control several different security devices. Each security device responds to a particular key code or to more than one key code in a master lock system. The key when energized presents its entire repertoire of key codes to the security device and when the security device senses its corresponding code, access is gained. The key may or may not be electrically active. The key may also include mechanical as well as electronic access control. Each security device contains a stored code and electronically correlates the stored code and input pulse patterns of the key codes. A large number of key codes are …
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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
- Granted February 28, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 28, 2001.
- 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.