Patents by Inventor Richard C. Boyle

Richard C. Boyle 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).

  • Visual monitor for electrical signals
    Patent number: 4628303
    Abstract: A circuit for monitoring the status of electrical signals, such as those present on the control and data lines of an RS-232 interface, includes a single operational amplifier and a dual-color LED indicator. The electrical characteristics of the LED's form a significant part of the circuit parameters. The monitor design provides a predetermined circuit input impedance and positive/negative switching thresholds to effect the selective illumination of the LED's.
    Type: Grant
    Filed: June 5, 1985
    Date of Patent: December 9, 1986
    Assignee: System Development Corporation
    Inventor: Richard C. Boyle