High security deadbolt lock
CA 1065638 A · Owner: Schlage Lock Company · Inventors: Schlage, Ernest L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high security lock has a protective shell with a hole in it. A lock body is held within the shell by an end plate heaving a loop a round the body . A plug having an end flange is rotatable in the body and is pierced by a keyway defining an edge notch in the end flange. A guard plate is disposed in the hole and over to end of the plug and is arranged to rotate in the shell with the plug by a tab disposed in the edge notch so that a restricted opening through the guard plate is kept in alignment with the keyway.
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
- Granted November 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 6, 1996.
- 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.