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Expired Canadian patentCanada

Helicopter airmobile work platform for working on power lines and tower structures

CA 1248930 A · Owner: Yenzer, Scott H. · Inventors: Yenzer, Scott H.

CIPO record

Overview

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

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Abstract From the Canadian patent

A work platform and helicopter assembly for working on a high-voltage power line such as an EHV power line. A work platform comprising a rectangular base of electrically conductive material is disposed transversely across a pair of helicopter skid tubes that extend longitudinally beneath the helicopter fuselage. The work platform is attached to the skid tubes such that the skid tubes may be laterally displaceable, upon landing, or take-off with respect to the, work platform. The work platform includes a workman supporting portion that extends laterally from the side of at least one skid tube to support a workman working on a high-voltage power line. The work platform skid tubes 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 January 17, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 3, 1985
GrantedJanuary 17, 1989
Term endedJanuary 17, 2006
Patent numberCA 1248930 A
Classification (IPC)B64D11/00 +1 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedOct 3, 1985Patent grantedJan 17, 1989Term endedJan 17, 2006

Sources & verification

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