Measuring apparatus
CA 2113214 C · Owner: Scott, Donald Anthony · Inventors: Scott, Donald Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A portable tool (41) for determining diameters and lengths along fallen trees (stems). The tool (41) includes callipers (2,3) for measuring diameters at positions along the stem and a tape measure (5) for measuring distance along the stem. In use spinning lasers (57) are used to set up datum planes (51) either vertically beside the stem or horizontally above the stem. The tool (41) is also provided with a laser sensor (13) so that distance may be determined from the stem to the datum (51) to enable the curvature of the log to be determined. Each of the measuring devices on the tool (41) provide a visual display of their measurements and encoders (9 26) provide an electronic signal …
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 January 11, 1994 and granted January 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 11, 2016.
- 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.