Switching system
CA 2250729 A1 · Owner: Park, Hyung Sik · Inventors: Park, Hyung Sik
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a switching system which can control a corresponding load by means of manipulating a manual switch and a remote control switch (107), and optionally turn on/off any load among a plurality of loads via a telephone line even though a user is at any distant places beyond the remote control of loads. The switching system of the present invention recognizes an allowed subscriber by inputting a predetermined password and , confirms a turning-on/off state of loads connected to a switching set unit via a voice to then control turning-ON/OFF of the corresponding load via button manipulation of a telephone set. Accordingly the switching system can perform , …
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 February 4, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 4, 2020.
- 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.