Transmission line changeover switch
CA 1202405 A · Owner: Nec Corporation · Inventors: Kobayashi, Hirokazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transmission line changeover switch switches "N (integer not smaller than 3)" active lines and two backup lines. The switch comprises "N" unit switches which are common in number to the active lines. Each unit switch selectively assumes three different statuses, or operation modes, so that the active lines may be connected to the backup lines.
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 March 25, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 25, 2003.
- 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.