Pressure compensated communication system
CA 1314089 C · Owner: Fincher, David S. · Inventors: Fincher, David S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a pressure compensated communication system having at least one audio transducer the pressure compensated communication system comprising a fluid tight housing for the or each audio transducer the or, each housing having a corresponding one of the or each of the audio transducers located therein and having an orifice coupled to a pressure compensation means the pressure, compensation means connected to the or each orifice and to a continuous supply of gas at a pressure equal to or slightly greater than the pressure of liquid surrounding the housing.
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 March 2, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 2, 2010.
- 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.