Tillage implement
CA 1203717 A · Owner: Mckay (Ralph) Limited · Inventors: Johnson, William M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1a -, ABSTRACT, A tillage implement for use in minimum tillage farming. The implement comprises a narrow earth engaging portion having an external lateral flange on the bottom edge of its forward section. The earth engaging portion comprises two parallel vertical side walls which provide a space for seed deposition.
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 29, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 29, 2003.
- 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.