Patents by Inventor Edwin C. Hulme

Edwin C. Hulme 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).

  • System for the programmed flashing of warning lights
    Patent number: 3938080
    Abstract: A system for the programmed flashing of a plurality of highway warning lights includes a plurality of slave receivers each associated with a warning light to be mounted on respective barricades along with one or more master transmitters associated with certain receivers and warning lights. The master transmitter provides a coded signal which causes the warning lights to flash either in synchronization or in a predetermined sequence. Fail safe operation is provided by the use of a substitute master if the original master is disabled. The programmed flashing provides for greater depth perception by the approaching driver.
    Type: Grant
    Filed: June 3, 1974
    Date of Patent: February 10, 1976
    Assignees: Kurt W. Thurston, William L. Selig
    Inventor: Edwin C. Hulme