Microphones
CA 2011690 C · Owner: Tardo, Timothy Bryan · Inventors: Tardo, Timothy Bryan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an improved dynamic microphone having increased acoustic sensitivity and a low level of shock or of handling sensitivity if fabrication techniques involving the use of diaphragm lamination employing a layer of metal mesh is combined with the use of a Neodymium Iron-Boron magnet having a "coin" shape (i.e. having a high ratio of diameter-toheight) and a voice coil having a diameter accepting the magnet. The invention also pertains to the method of making a dynamic microphone which comprises the steps of forming a diaphragm body of thin synthetic resinous sheet material of high tensile and flexural strength, forming a multi-layer central portion of thin synthetic resinous …
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 March 7, 1990 and granted April 27, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 7, 2012.
- 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.