Patents by Inventor Eugene M. Ring

Eugene M. Ring 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).

  • Acoustic Transducer
    Patent number: 5548658
    Abstract: An electret assembly for a microphone is disclosed. The microphone is adapted for use with a hearing aid. The electret assembly comprises a motor ring having first and second opposing peripheral surfaces and an aperture extending therebetween. The motor ring includes four generally co-planer ledges recessed below the first opposing surface and defining a rectangle. A charged plate is disposed on the ledges. The charged plate is substantially flush with the first opposing surface. A flexible diaphragm is secured to the second opposing surface and extending across the aperture. A bead of epoxy secures the charged plate to the motor ring.
    Type: Grant
    Filed: June 6, 1994
    Date of Patent: August 20, 1996
    Assignee: Knowles Electronics, Inc.
    Inventors: Eugene M. Ring, William J. Murphy