Method and apparatus for measuring water velocities and discharges in rivers and the like
CA 2107043 A1 · Owner: Stedtnitz, Wolfgang · Inventors: Stedtnitz, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved method of measuring the flow velocity of water bodies, characterised in that, in addition to a principal direct path along which acoustic signals are propagated across and through the direction of flow of water an auxiliary, indirect path for acoustic signals is utilised comprising two segments of an acoustic signal reflected at a water-air or water-ice boundary of said body of water.
Read the whole patent
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 September 27, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 27, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2015.
- 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.