Dart (humming bird)
CA 2060916 A1 · Owner: Lawrence, Bruce · Inventors: Lawrence, Bruce
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The barrel portion of a game dart is provided with a point section projecting from the front end of the barrel and having the length of at least 1.1/2 inches an preferably not much more than 2 inches. The dart provided with such barrel has been accepted as providing an improved accuracy of the dart.
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 February 10, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 10, 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.