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Expired Canadian patentCanada

Striking tool, head and handle and methods of manufacturing

CA 1291397 C · Owner: Krauth, Walter Kopmeier · Inventors: Krauth, Walter Kopmeier

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

Striking tools, heads and handles for such tools and methods of manufacturing them. A tool head according to this invention employs a flange which extends from each side of the head between the forward and rear portions of the head. The portion of the head within the periphery of each flange is generally concave and narrows to form a web extending longitudinally in the striking direction to connect the forward and rear portions. The web may include at least one opening communicating between the two concave surfaces. The flanges increase the cross-sectional area and moment of inertia of the head relative to the striking direction and relative to the handle axis. The resulting head enjoys …

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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 October 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 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 16, 1988
GrantedOctober 29, 1991
Term endedOctober 29, 2008
Patent numberCA 1291397 C
Classification (IPC)B25D1/00

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedAug 16, 1988Patent grantedOct 29, 1991Term endedOct 29, 2008

Sources & verification

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