Patents by Inventor Nolan D. Self

Nolan D. Self 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).

  • Short range radio information system
    Patent number: 5199108
    Abstract: A radio information system operating at low power transmits in the AM broadcast band. A message to be broadcast is digitized and stored in a random access memory. It is retrieved from the memory, converted to analog form, and used to modulate a carrier signal. The message is continuously repeated, allowing nearby persons with AM radio sets to receive the message. In order to extend the useful range of the information system, an impedance matching circuit with a high-Q inductor is located between the antenna and the output circuitry of the transmitter.
    Type: Grant
    Filed: December 30, 1988
    Date of Patent: March 30, 1993
    Assignee: Electronic Communications, Inc.
    Inventors: Richard E. Morgan, Nolan D. Self