Piezoelectric transducers
CA 2235754 C · Owner: New Transducers Limited · Inventors: Warnaka, Glenn E.; Warnaka, Mark E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention, consists of a piezoelectric material (11), a substrate or, spacer (12) and an electrical connector means (13) for, a wire harness or other electrical connection. The, substrate (12) is used to enhance the motion of the, piezoelectric element (11) by spacing the piezoelectric, element (11) from the diaphragm. The substrate, (12) is larger in area than the piezoelectric element, (11). The transducer system (10) acts to impart motion, to the diaphragm. The transducer (10) comprises, a piezoelectric element (11) subject to displacement by, applied electric potential (13) that has a top side, an underside and an outer perimeter. The, substrate (12) is joined to the underside of …
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 November 4, 1996 and granted August 20, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 4, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 4, 2018.
- 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.