Printed circuit board
CA 2109383 A1 · Owner: Duxbury, Guy M. · Inventors: Duxbury, Guy M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plurality of pairs of parallel conductive wires are supported by a flexible non-conductive sheet, equidistant from two conductive ground meshes which sandwich the wires therebetween. Each mesh forms a matrix, defining an array of intersecting conductors. The offset of the intersections from the conductive wires incrementally changes along the longitudinal axes of the pair of conductive wires. This ensures the capacitance between each conductive wire and the mesh is substantially balanced regardless of where the conducive wires run so that cross talk, between the pairs of conductive wires will remain relatively low.
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 27, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 27, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 2015.
- 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.