Patents by Inventor David W. Rhines

David W. Rhines 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).

  • Sound detecting device
    Patent number: 4479239
    Abstract: A sound detecting device for amplifying distant or weak sounds, including a novel loud sound suppressing circuit for temporarily shunting the amplifier input signal to ground whenever the amplifier output signal exceeds a predetermined amplitude. The microphone, amplifier, and sound suppressing circuit are mounted in a wand shaped much like a flashlight. The wand can be attached to headphones.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: October 23, 1984
    Assignee: Silver Creek Nurseries, Inc.
    Inventor: David W. Rhines