Mirror wiper apparatus
CA 2020879 A1 · Owner: Spence, Jonathan P. · Inventors: Spence, Jonathan P.; Spence, Jonathan P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention comprises a rear view mirror having a surrounding frame with a sleeve mounted vertically along one vertical edge of the frame. The sleeve has a slot and a screw is mounted withing the sleeve with a pair of opposing spiral grooves connected together at their upper and lower edges to form an oscillating path. A ring is slidably mounted on the screw with a pin on the ring engaging the screw in one of the grooves. A motor drives the screw to cause the ring to oscillate vertically on the screw and a wiper has an arm connected to the ring through the slot in the sleeve so, that the oscillation of the ring on the screw causes the wiper to oscillate upward and downward on the mirror …
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 11, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 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.