Piezotransformer with a large transformation ratio
CA 2373872 A1 · Owner: Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh · Inventors: Hanisch, Thomas; Gueldner, Henry; Kartashev, Igor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Piezoelectric transformer with an input and an output region. Input and/or output regions are sub-divided into sections (13-16) of inverse polarization. Depending on the number of sections a multiplication, of the transformation ratio is achieved without increasing the field strength in the piezoelectric material.
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 February 28, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 28, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 2024.
- 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.