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Expired Canadian patentCanada

Multi input lightning detection system

CA 1330669 C · Owner: Ostrander, Kenneth A. · Inventors: Ostrander, Kenneth A.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

An apparatus for providing a map-like display of weather phenomena such as lightning discharges in which, the distance from an observation location to the source of the discharge is determined from the ratio of the integrated intensity of two different components of lightning produced signals, the intensity of the first component varying as the inverse of the distance and the intensity of the second component varying as the inverse of the square of the distance.

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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 July 12, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 12, 2011.
  • 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 4, 1989
GrantedJuly 12, 1994
Term endedJuly 12, 2011
Patent numberCA 1330669 C
Classification (IPC)G01N1/16 +1 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedJan 4, 1989Patent grantedJuly 12, 1994Term endedJuly 12, 2011

Sources & verification

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