Method and apparatus for assessing or predicting characteristics of wood or other wooden materials
CA 2415361 A1 · Owner: Industrial Research Limited · Inventors: Harris, Paul David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to apparatus and method for determining a characteristic, such as stiffness, of a log stem, wood piece or other wood , specimen. A wave generator 102 produces a frequency varying signal which drives a transducer 103 which is coupled to the specimen to impart a frequency varying acoustic wave into the specimen. A receiver sensor 105 detects the resulting acoustic wave and a transmit sensor detects the output from the transducer 103. A characteristic response 109 of the specimen is determined from the receiver sensor signal, transmit sensor signal and excitation signal using digital 107 and analogue 106 signal processing. The characteristic 108 is …
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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 July 23, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 23, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2023.
- 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.