Expired Canadian patentCanada
Method and device for electrically powering a transducer used to generate sound and ultrasound vibrations
CA 1267720 C · Owner: Poupaert, Pierre · Inventors: Poupaert, Pierre; Thirion, Bernard
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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
- Granted April 10, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2007.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 26, 1986
GrantedApril 10, 1990
Term endedApril 10, 2007
Patent numberCA 1267720 C
Classification (IPC)B06B1/02
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.