Method of detecting structures
CA 1294468 C · Owner: Cohen, Christopher John · Inventors: Cohen, Christopher John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of obtaining a stereoscopic view from two satellite or two aerial photographs of the same or overlapping area is provided. The method involves aligning the photographs in a stereoscope with the horizontal axis of the stereoscope alinged parallel to the flight path taken to produce the photographs or parallel to the scan direction employed by the satellite. The photographs being produced on infra red film in the case of serial photography or enhanced to accentuate red and infra red in the case of satellite photography. A series of photographs are produced each with a desired colour balance. The photographs are cross compared in the stereoscope to produce an enhanced stereoscopic …
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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 January 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 21, 2009.
- 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.