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Expired Canadian patentCanada

Multi-function raking mechanism

CA 1293617 C · Owner: Webster, Emmett G. · Inventors: Bigelow, Donald O.; Webster, Emmett G.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A raking mechanism having a frame and a pair of rake baskets movably mounted thereon is disclosed wherein the frame includes a draft member adapted for connection to a prime mover and a pair of arms pivotally connected to the draft member and supported above the ground by respective wheels. The arms carry the respective rake baskets and are pivotally movable in a generally horizontal plane to displace the rake baskets transversely of the draft member. The rake baskets are also movable relative to the respective arms to vary the angle at which the rake baskets engage the crop material lying on the ground to provide a variety of positions of the rake baskets relative to the draft member and, …

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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

  • Granted December 31, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 31, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 20, 1987
GrantedDecember 31, 1991
Term endedDecember 31, 2008
Patent numberCA 1293617 C
Classification (IPC)A01D78/14 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedAug 20, 1987Patent grantedDec 31, 1991Term endedDec 31, 2008

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.