Stone picking machine
CA 1138210 A · Owner: Dubois, Gerald · Inventors: Dubois, Gerald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stone picking machine is disclosed. The machine comprises a frame having a draft tongue adapted to be attached to the drawbar of a tractor, a cross-axle with a pair of wheels supporting the frame a, box mounted on the frame, means for picking up stoned in the field while the machine is being hauled by a tractor and for loading the stones in the box, and means for raising the box upwardly and for tilting it sidewise to dump the stones into a truck or a pile of stones.
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
- Granted December 28, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 28, 1999.
- 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.