Power supply apparatus with circuit load sensor
CA 2265137 C · Owner: Matlo, Darryl J. · Inventors: Matlo, Darryl J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A power supply apparatus 10 with circuit load sensor provides an extension cord 20 having first and second ends extending from an enclosure 30. Within the, enclosure, a power supply indicator circuit 40 lights an LED in response to the plug, of the extension cord being inserted into a live outlet. Also within the enclosure, a, power consumption indicator circuit 60 lights an LED in response to consumption of, power by a load plugged into the socket of the extension cord. A nominal voltage, drop across a TRIAC 70 carried in-line with the neutral conductor within the enclosure triggers the power consumption indicator circuit when the load draws current.
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 March 10, 1999 and granted February 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2021.
- 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.