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Expired Canadian patentCanada

Acoustic sub-surface interrogator

CA 1319747 C · Owner: Guigne, Jacques Y. · Inventors: Guigne, Jacques Y.

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 positionable transducer array on a stationary platform proximate a layered site on the seabed coherently insonifies locations at the site with a signal having a selected power resultant centre frequency, beamwidth, bandwidth shape and, incident angle. A positionable receiver array on the platform captures the return signals. Sub-surface acoustical properties of the location are then predicted from the return signals and a calculation of the speed of sound in water at the site. Subsequent locations at the site are then interrogated and an interpolation is made of acoustical properties between locations to develop a model of the acoustical properties at the site.

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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 June 29, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 29, 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.
FiledApril 12, 1989
GrantedJune 29, 1993
Term endedJune 29, 2010
Patent numberCA 1319747 C
Classification (IPC)G01S15/00 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedApril 12, 1989Patent grantedJune 29, 1993Term endedJune 29, 2010

Sources & verification

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