Patents by Inventor Fred W. Irving

Fred W. Irving 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).

  • Ground fault protection for electrical power distribution systems
    Patent number: 4001804
    Abstract: Ground fault protection for an electrical installation is provided by isolating from neutral the service entry box and the raceways and conduits forming a ground return system connected to the box, and connecting a device between the box and neutral which responds to current leakage into the ground return system above a predetermined level by opening a switch in the entry box to interrupt the supply to the system.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: January 4, 1977
    Assignee: I-T Safety Enterprises Limited
    Inventor: Fred W. Irving