Needle for use in tufting machine
CA 2005456 C · Owner: Hakui, Tamotsu · Inventors: Hakui, Tamotsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A needle for a tufting machine having its bottom end pointed and having its lower half portion flattened. The flattened portion has one edge thereof chamferred to form a tapered face. A yarn insert hole is formed above the pointed tip. It is inclined at a predetermined angle so that its lowermost point will be located nearer to the tapered edge than the other edge. The inclined hole allows the looper to hook the yarn more reliably and helps to decrease the possibility of cutting or mishooking of the yarn.
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 December 13, 1989 and granted August 24, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2011.
- 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.