Geometric tennis lanes
CA 2093430 A1 · Owner: Braden, Victor K. · Inventors: Braden, Victor K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Tennis lanes are disclosed which comprise a plurality of pie-shaped lanes (3, 5, 9, 11, 13, 15) forming a circle or a semi-circle configuration. The lanes are substantially triangular in shape. The tennis lanes define upright-side targets (11) positioned to indicate if a hit tennis ball would be in or out of a tennis court. The lanes provide a central target (14) area simulating a, standard net (30), top band of the net and area above the net. A tennis net is connected between two sidewall support posts (6) to simulate the area in a normal court. Each tennis lane is separated from other lanes by sidewalls (7, 9). Each lane is equipped with a tennis ball-throwing device (16) and a device …
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 October 26, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 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.