Moulded transducer
CA 2251395 C · Owner: Milltronics Ltd. · Inventors: Thomas, John William; Hare, Ronald Gregory
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electro-acoustic transducer is manufactured by forming a transducer assembly at least one piezoelectric element electrodes contacting the element, and acoustic loading blocks, and applying successive superposed mouldings of material of differing acoustic properties around said transducer assembly to provide the transducer while, maintaining electrical coupling between the transducer assembly and the exterior of the transducer the mouldings, providing at least one acoustic matching layer covering a radiating surface of the transducer assembly a casing, surrounding the remainder of the transducer assembly at, least one layer of acoustic isolating material between the casing and the …
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 26, 1998 and granted August 5, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 26, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2020.
- 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.