Helicopter logging system
CA 2230045 A1 · Owner: Jarman, Philip · Inventors: Jarman, Philip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of logging a tree includes the steps of cutting the tree part way through the trunk, with a cut near the bottom thereof leaving a connecting portion of the trunk connecting an, upper portion of the trunk above the cut to a lower portion of the trunk below the cut. A, helicopter above the tree is connected to a point near the top of the trunk. The helicopter, is moved away from the tree thereby brewing the connecting portion and allowing the upper, portion of the tree to be carried away by the helicopter. The method utilizes a helicopter, logging tool comprising a body having a connection for a lifting device. There is an elongated, guide connected to the body by a hinge. The …
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 19, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 19, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2020.
- 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.