Improved planting apparatus and related method
CA 2224138 C · Owner: Connell, James W. Jr. · Inventors: Spencer, Sarah E.; Connell, James W. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A new mobile planting apparatus has first and second ranks of powered row units and first and second power devices connected respectively to and providing driving horsepower to such ranks. Suitable power devices include mechanical, electrical and hydraulic types with the latter being preferred. Each power device includes a control mechanism permitting the driving horsepower provided to the respective ranks to be independently controlled. That is, each power device may be independently operated or disabled and the power devices may run at different speeds and horsepowers. The disclosure also involves a new method for planting seeds in a field. The method enables a grower using two ranks of …
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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 December 9, 1997 and granted July 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 9, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 2019.
- 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.