Circuit for protecting semiconductor circuit
CA 1319170 C · Owner: Mitsubishi Mining And Cement Co. Ltd. · Inventors: Ikeda, Hiroyuki; Ito, Takaaki; Uchida, Akio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A protection circuit. for a semiconductor circuit for protecting it from a thunder surge and overcurrent or overvoltage. A surge absorbing element and a Zenor diode are in parallel connected to the semiconductor circuit A first fuse are connected before between the electric source and the surge absorbing elememt. A second fuse and a resistor which is in, series connection is arranged between the surge absorbing element and the Zenor diode.
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 June 15, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 15, 2010.
- 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.