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Expired Canadian patentCanada

Apparatus for stranding wire

CA 1113806 A · Owner: Northern Telecom Limited · Inventors: Zuber, Bretislav P.

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

Abstract of the Disclosure Wire stranding apparatus for giving a periodic reverse twisting operation, in which a rotationally flexible elongate member, preferably a rod, carries wire guiding elements extending radially outwardly from it. Each element has guide holes for wires as they are passed along the rod. Stranding is done by holding an upstream end of the rod stationary and while the wires are moved along guide paths the downstream end of the rod is rotated for a predetermined number of revolutions about its axis alternately in one direction and then the other. Wires are thus stranded in alternating directions. - i -

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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 8, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 8, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 19, 1979
GrantedDecember 8, 1981
Term endedDecember 8, 1998
Patent numberCA 1113806 A
Classification (IPC)D01H7/00 +1 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedDec 19, 1979Patent grantedDec 8, 1981Term endedDec 8, 1998

Sources & verification

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