Vehicle light, windshield wiper control system
CA 2115169 C · Owner: Stumpf, Donald M. · Inventors: Stumpf, Donald M.; Benedict, Charles E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vehicle's input switches relating to ignition (20) lights (41) and moisture , (44) or rain provide responsive inputs that feed through a digital logic circuit (12) to outputs of an electronic switching device (14) for automatically activating the vehicle's lights (21. 22) and wipers (23). An alarm (24) may be activated if certain input switches are turned on when the ignition is off. The digital logic circuit (12) may be discrete a programmable read only memory (PROM) or a programmable logic array (PLA). The electronic switching device (14) may constitute a driver circuit (13) and an integrated circuit which includes both a relay switching circuit (K1, K2) and a switched circuit …
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 August 3, 1992 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 3, 2014.
- 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.