Electric code lock set for telecommunication cabinet
CA 2100527 A1 · Owner: Cheng, Dick · Inventors: Sheng-Cheng, Hsieh; Cheng, Dick; Hsing, Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric code lock set mounted in a telecommunication cabinet includes a code-storing device for storing therein a preset code, an electric lock energized by an electric lock power source selected from one of a portable locking device power source and an electric power source from a monitoring center if to be unlockied, a code-identifying control device electrically connected to the code-storing device for identifying whether there is an input code identical to the preset code and for generating an unlocking signal if said codes are identical, and an electric lock circuit electrically connected to the code-identifying control device for unlocking the electric lock after the electric lock …
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 July 14, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 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.