Patents by Inventor Norman Lesser

Norman Lesser 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).

  • Totally fusible tunnel ventilation damper system
    Patent number: 4898088
    Abstract: A totally fusible tunnel ventilation damper system which comprises an enlarged ventilation opening partially covered by a sheet of fusible material. The sheet of fusible material is supported by a series of bars traversing the ventilation opening and is secured to the support bars by fire retardant fasteners.
    Type: Grant
    Filed: February 2, 1989
    Date of Patent: February 6, 1990
    Inventors: Norman Lesser, Fred Horowitz