Wood unit
CA 2043374 A1 · Owner: Hammarstrom, Lars · Inventors: Hammarstrom, Lars; Hammarstrom, Lars
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wood unit is produced by cutting at least two substantially corresponding slabs, so that from each of them two wood pieces being substantially the mirror image of each other are obtained. Gluing surfaces have been formed on these wood pieces by cutting material away and they have after that been glued to each other with the right angled corners thereof forming the outer corners of a wood unit with a substantially constant rectangular outer cross section shape and a longitudinal inner hollow space.
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 June 3, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 3, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2013.
- 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.