A seed tube for an agricultural seeding machine
CA 2211504 A1 · Owner: Ankum, Robert Harper · Inventors: Ankum, Robert Harper
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hollow seed tube extending between a seed meter and a planting furrow is provided with an integral mounting hook and a resilient and integral mounting assembly that snap fits into a planting unit frame. The mounting assembly comprises two forwardly extending ears each having a transversely extending projection for engaging a mounting hole in the planting unit frame.
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 August 8, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 8, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 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.