Solid state overcurrent protection device
CA 1330451 C · Owner: Bell-Northern Research Ltd. · Inventors: Hung, Francis Yun-Tai
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A solid state overcurrent protection device for use with an external current sensing impedance comprises a semiconductor body having a first region of a first conductivity type; a second region vertically adjacent to the first region, the second region being of a second conductivity type opposite to the first conductivity type; a third region vertically adjacent to the second region the, third region being of the first conductivity type; fourth and fifth regions vertically adjacent to the third region the, fourth and fifth regions being horizontally adjacent to and interdigitated with one another, and being of the first and second conductivity types respectively; …
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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 28, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 28, 2011.
- 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.