Hockey puck device
CA 2061075 C · Owner: Shepherd Asociates · Inventors: Shepherd, Charles Grey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A practice ice hockey puck is provided for indicating in relative terms, the, energy of impact when the puck is driven into a solid object. The puck has a cylindrical case extending about a central axis and defining an axially extending well, containing a housing which in turn contains an indicator arranged to move angularly, against frictional restraint. A driver is coupled to the indicator so that on impact, the energy in the driver is transferred to the indicator to move the indicator angularly relative to the housing against the frictional restraint. The degree of, angular movement of the indicator relative to the housing is recorded on a scale, thereby showing the user in relative …
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 12, 1992 and granted September 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 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.