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Expired Canadian patentCanada

Rotary cutter shield

CA 1295839 C · Owner: Willer, David Austin · Inventors: Kulak, John; Willer, David Austin

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

Abstract of the Disclosure Guard structure for the forward portion of a rotary cutter including a front sill with a formed angle section that is permanently attached to the cutter to provide both protection from the rotary blade and structure for hanging chain links across the width of the front opening to restrict material from being thrown from the front of the cutter. In addition, the angle section strengthens the forward portion of the cutter.

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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 February 18, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 18, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 9, 1987
GrantedFebruary 18, 1992
Term endedFebruary 18, 2009
Patent numberCA 1295839 C
Classification (IPC)A01D75/20 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedNov 9, 1987Patent grantedFeb 18, 1992Term endedFeb 18, 2009

Sources & verification

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