Universal lock and key
CA 2127811 C · Owner: Kim, Kwon Woo · Inventors: Kim, Kwon Woo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A universal lock and key assembly in which the lock (24) is rekeyable and the key is also changeable. The key (36) has a shank portion (38) having a longitudinally extending tooth slot 140) in its top surface. A plurality of teeth (50) have their bottom ends inserted into the tooth slot (40) in any desired sequence to give a predetermined profile to the teeth of the key. The bottom pin cylinder (94) of the lock has mating bottom pins (100) for each of the respective teeth. They are then arranged in a coordinated sequence in the bottom pin cylinder (94) of the lock. The structure of the system allows an individual to change both the configuration or the key (36) and also the mating structure …
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 January 13, 1993 and granted July 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 2015.
- 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.