Patents by Inventor Michel Redolfi

Michel Redolfi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Underwater sound delivery system
    Patent number: 4639903
    Abstract: A sound transducer mounted inside a buoy for broadcasting sounds both underwater and above water. The buoy is a hollow sphere which admits water; but whose buoyancy is maintained by air-filled balls or a bladder captured inside.
    Type: Grant
    Filed: November 21, 1983
    Date of Patent: January 27, 1987
    Inventor: Michel Redolfi