Patents by Inventor Edward John Murphy

Edward John Murphy 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).

  • Electronic stereophonic amplifier
    Patent number: 6219424
    Abstract: A device for use in a stethoscope, the device including two diaphragm-type sound accumulator chambers, one microphone located in each accumulator chamber and one amplification stage connected to each microphone for electronically amplifying audio signals received by the microphones, and an output connector for outputting the amplified audio signals.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: April 17, 2001
    Assignee: Hunter Area Health Service
    Inventor: Edward John Murphy