Patents by Inventor Billy E. League

Billy E. League 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).

  • Fluid flow check device
    Patent number: 4805665
    Abstract: A fluid flow check device is adapted for interconnection with a fluid flow line check valve, and includes a housing having a switch mounted therein. A pivot shaft is connectable at a first end to a flapper pivot axle of the check valve and at a second to the switch. A timed alarm circuit is connected to the switch and activates an alarm when fluid flow starts to cease for a preset duration.
    Type: Grant
    Filed: January 4, 1988
    Date of Patent: February 21, 1989
    Inventor: Billy E. League