Patents by Inventor Leslie F. Sparrow

Leslie F. Sparrow 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).

  • Door structure and mechanism for sealing the gap between the closure member and framework
    Patent number: 4156989
    Abstract: A door comprising a supporting framework, a closure member supported by the framework and a mechanism for sealing the door at least at the bottom thereof and including a base member lying below the closure member in its closed position and apparatus for lifting the base member to close any gap between it and the closure member.
    Type: Grant
    Filed: February 3, 1977
    Date of Patent: June 5, 1979
    Inventor: Leslie F. Sparrow