Patents by Inventor Kirby C. Fortenberry

Kirby C. Fortenberry 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).

  • Access door
    Patent number: 4667449
    Abstract: An access door for an air conditioning duct or the like has a circular frame intended to be rotated into a circular opening in the duct wall. The frame has an inwardly extending circular shoulder against which abuts a removable circular door held in place by latch means engaging within a circular groove formed in the frame.
    Type: Grant
    Filed: March 4, 1986
    Date of Patent: May 26, 1987
    Assignee: Flexmaster U.S.A., Inc.
    Inventors: Henry M. Keating, Kirby C. Fortenberry