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Expired Canadian patentCanada

Load lifting device load sensing

CA 1291725 C · Owner: Fmc Corporation · Inventors: Leskovec, Edward Valentine; Schwehr, Richard Anthony

CIPO record

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

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Abstract From the Canadian patent

Load Lifting Device Load Sensing Sensors associated with load carrying, members are inaccurate incorrectly sense the, position of the load and are subject to impact, forces which cause premature sensor failure. A load lifting device having a load carrying member and first and second sensors and first and second reflectors on the load carrying member is provided. The sensors are mounted on a first end portion of load carrying member at longitudinally spaced apart locations and the first and second reflectors are mounted on a second end portion of the load carrying member at spaced apart locations on the second end portion. The first sensor delivers a first signal to the first reflector 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 November 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 5, 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.
FiledJanuary 22, 1988
GrantedNovember 5, 1991
Term endedNovember 5, 2008
Patent numberCA 1291725 C
Classification (IPC)B66F9/07

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedJan 22, 1988Patent grantedNov 5, 1991Term endedNov 5, 2008

Sources & verification

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