Semiconductor switch
CA 1069975 A · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Akamatsu, Masahiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A semiconductor switch comprises a transistor connected to a main circuit having a DC current and a load pulsing means, which is connected in series in an electric path connecting the collector and the emitter of the transistor and a thyristor, connecting main current electrodes in parallel to series of the transistor and the pulsing means.
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 January 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 1997.
- 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.