Lawn aerating and weed tools
CA 2290881 C · Owner: Barber, Lyle C. · Inventors: Barber, Lyle C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lawn aerating and weeding tool has an elongate metal attachment secured to one, end of an elongate handle. The metal attachment comprises an annular cutting blade at one, end of the metal attachment a retainer at an opposite end of the metal attachment and a, connection between the annular cutting blade and the retainer; the retainer being secured to, the one end of the handle. The connection provides a gap between the annular cutting blade, and the retainer in axial alignment with the annular cutting blade and the handle, the gap, being open towards opposite sides of the metal attachment to facilitate removal of earth plugs, cut by the annular cutting blade.
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 November 25, 1999 and granted January 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2021.
- 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.