Electrostatic loudspeaker
CA 1190481 A · Owner: Peters, Bernardus G. · Inventors: Peters, Bernardus G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrostatic loudspeaker system includes a transformer the secondary winding of which is connected to the conductive plates of an electrostatic loudspeaker and the primary winding of which is energized by an audio input signal through a frequency response equalizing network which includes an autotransformer winding as well as resistive and capacitive elements. Specifically, the autotransformer winding is connected in parallel with the primary winding one audio input ter-, minal is directly connected to one end of the autotransformer winding, at least one tap of the autotransformer winding is connected through a resistive element to the other audio input terminal and the other end of 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
- Granted July 16, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 16, 2002.
- 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.