Distance measuring method and apparatus therefor
CA 2038818 A1 · Owner: Nagamune, Akio · Inventors: Komine, Isamu; Nagamune, Akio; Tezuka, Kouichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A distance measuring method and an apparatus therefor, in which used are first and second pseudo random signals which are equal to each other in pattern but slight different from each other in frequency. A first time-series pattern obtained by multiplying the first pseudo random signal by the second pseudo random signal is generated, laser light intensity-modulated with the first pseudo random signal is radiated to a target, the light reflected from the target is received, and a intensity change of the received reflected-light is converted into an electric signal. A second time-series pattern is obtained by multiplying the electric signal as a reception signal with the second pseudo random …
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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 March 21, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2013.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.