Electric key
CA 1298716 C · Owner: Nakauchi, Shunsaku · Inventors: Nakauchi, Shunsaku
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric key has a self-holding electromagnet for keeping attract a movable means holding a locking block in its nonconductive state and for releasing the movable means in its conductive state by a spring. the movable means is returned by a hand-operation to a position where it is attracted on the electromagnet. This results in saving of electric power.
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 April 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 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.