Electrical probe
CA 2021924 C · Owner: Kalishman, Calvin · Inventors: Kalishman, Calvin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hand-held probing device is adapted for use in testing the existence and amount of electrical potential in an automobile engine block or other object under investigation. The device has a specially formed housing from which extends a probe and a ground lead at opposite ends. The housing also includes a voltmeter and an electric bulb connected in parallel between the probe and ground lead. The housing also includes a switch which enables the device to be operated while held in one hand thus enabling the other of the user's hand to be free and usable for other functions.
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 July 25, 1990 and granted September 20, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 25, 2012.
- 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.