Control system
CA 2080716 C · Owner: Stobbe, Anatoli · Inventors: Stobbe, Anatoli
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Control systems are described that permit access to certain buildings or rooms only to authorized persons. The control systems comprise data carriers (transponders), which are carried by these persons and brought into local proximity to a reading device so that, the data of the data carrier can be transmitted wireless to the reading device. The reading device transmits the authorization data received into a central evaluating unit, where said authorization data are checked. If the authorization data correspond with the check data the, evaluating unit causes the release of a door so that the, authorized person can enter a room. Only the data carrier is programmed with the customer-specific …
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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
- Filed October 16, 1992 and granted September 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2014.
- 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.