Device and tool for securing electrical conduction at connections
CA 2228509 C · Owner: Uno, Tsuyoshi · Inventors: Uno, Tsuyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides conductive devices and tools to provide electrical conduction with a generally planar conductor which is covered with an insulation substance such as paint rust, or dust, by scraping a portion of the conductor and removing the insulation substance. A conductive device includes a conductive metal serration means, and a tool utilizes such a serration device. Such a serration device can be a bolt device nut device, or washer device, or washer-incorporated thread device. A connecfor device is also disclosed to provide electrical conduction between a conductor and a conductor plate covered with an insulation substance.
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 September 2, 1996 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 2, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 2, 2018.
- 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.