Patents by Inventor William Francis Palmer

William Francis Palmer 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).

  • Fire and smoke free system for high rise building stairways
    Patent number: 4054084
    Abstract: A fire and smoke free stairway in the event of fire in high rise buildings can be maintained by developing a velocity pressure of air through the fire doorway, from the fire stairway each time the door is opened during evacuation and without pressurizing the stairway significantly.
    Type: Grant
    Filed: November 18, 1975
    Date of Patent: October 18, 1977
    Inventor: William Francis Palmer