Locking device
CA 1136675 A · Owner: Gotanda, Motohiro · Inventors: Gotanda, Motohiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A locking device comprising driving members driven by a thumb turn from inside a room and by a key from outside the room, dead bolts brought into engagement with the driving members to advance or retreat to lock or unlock the room and, switches for detecting the advance and retreat of the dead bolts. Said dead bolts are formed by dividing the thickness of a dead bolt to two parts while said driving members by dividing the thickness of a driving member to two parts said, dead bolts are brought into engagement with said driving members to advance or retreat, and one of said driving members is driven by the thumb turn while the other by the key. An engaging means is provided between …
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 30, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 1999.
- 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.