Patents by Inventor Leonard Phillips

Leonard Phillips 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: 4206784
    Abstract: An access door primarily designed to provide an insulated entrance to heating, ventilating and air conditoning ducts consisting of a two-pan structure lockably connected together by a simple unfastening means.
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: June 10, 1980
    Inventor: Leonard Phillips