Method and apparatus for determining the position of an aerial camera at the time of shutter release
CA 2079743 C · Owner: Geosurv Inc. · Inventors: Smith, Paul; Mrstik, Paul; Pelletier, Luc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for obtaining data from which to determine the location of an aerial camera at the time of shutter opening the apparatus comprising a GPS continuously recording data received from a GPS satellite, a photodetector for mounting inside an aerial camera for detecting the opening of the shutter of the camera; and means connecting the photodetector to receiver for carrying a time marking signal from the detector to the receiver.
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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
- Filed October 2, 1992 and granted May 31, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.