Programmable key and improved lock assembly
CA 1308565 C · Owner: Ford Motor Company · Inventors: Stinar, Robert P.; Mcnamara, David A.; Calvas, George T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present inventions relates to the field of security devices and more specifically to the area of key locks. Recently, several concepts have been patented in which a conventional tumbler actuating key is combined with an auxiliary coding mechanism in order to provide a higher degree of security by increasing the number of codes beyond those available on conventional tumbler actuated keys. In U.S. Patent No. 4,200,227 a conventional, tumbler actuating key is described as containing a coded electrical circuit that is responsive to short wave radiation. The circuit is embedded within a plastic assembly that is welded or otherwise bonded to the key handle so that the electrical circuit is …
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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 October 13, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 2009.
- 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.