Tree harvesting apparatus
CA 2117187 C · Owner: Widegren, Lars · Inventors: Widegren, Lars
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a tree harvester which is intended to be fitted to a crane arm or the like for the purpose of uprooting trees. In order to supplement the ground preparation that is automatically achieved adjacent the exposed soil areas left in the ground subsequent to pulling out a tree by its roots it is proposed in , accordance with the invention among other things, that the, tree harvester is provided with a soil scraping or soil cultivating unit (70) intended to be brought into engagement with and moved alone the ground so as to prepare the ground for forest regeneration.
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 September 2, 1992 and granted May 20, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 2, 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.