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Expired Canadian patentCanada

Laser measuring devices

CA 1324898 C · Owner: Reiton Corporation · Inventors: Rabson, Thomas A.; Reifel, Michael D.; Wright, John V.

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

In the present apparatus, a system converting stress in a structural member into strain by positioning a body of lasing material (creating a coherent beam) on a structural member. The body has parallel end faces. One is opposite a mirror attached to the structural member. The member strain varies laser cavity spacing and modulates the laser beam as a function of strain.

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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 7, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 12, 1989
GrantedDecember 7, 1993
Term endedDecember 7, 2010
Patent numberCA 1324898 C
Classification (IPC)G01B11/16

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedMay 12, 1989Patent grantedDec 7, 1993Term endedDec 7, 2010

Sources & verification

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