Multilayer printed circuit board
CA 2001480 A1 · Owner: Nasu, Yoshihiro · Inventors: Nasu, Yoshihiro; Mitsuhashi, Kazuyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multilayer printed circuit board comprising a laminate of at least one glass fiber nonwoven cloth layer impregnated with thermosetting resin and glass fiber woven cloth layers impregnated with thermosetting resin the laminate having a pair of V-cut grooves formed therein so that only glass fiber nonwoven cloth layer remains uncut whereby the multilayer printed circuit board can be divided at the uncut glass fiber nonwoven cloth layer along the V-cut grooves into a plurality of printed circuit board portions which can be mounted having a practical size, 2 0
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 October 25, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 25, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 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.