Seed drill
CA 1267570 C · Owner: Dreyer, Heinz · Inventors: Wiemeyer, Benno; Dreyer, Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A seed drill comprising a frame storage tanks, and coulters and having at least two separate inlets and outlets respectively for two different materials the outlets, positioned one in front of the other as seen in the direction of operative travel, to provide front and rear outlets with, depth guide and pressure rollers arranged behind the coulters thus the one material being fed to the front outlet and the, other material to the rear outlet through separate guides, within the coulters and in adjustable amounts for introduction, into the soil, and a narrow breakup element having a lower tip the element being arranged on the side of the coulter facing the direction of operative travel, for …
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 April 10, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2007.
- 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.