Patents by Inventor Paul C. Gillenwater

Paul C. Gillenwater 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).

  • Tier drop grid system
    Patent number: 4794745
    Abstract: A suspended ceiling grid member which comprises a web portion, an upper bulb extending along the top of the web portion, a pair of flanges extending outwardly from the bottom of the web portion, the flanges being adapted to support ceiling tiles, and a lower bulb extending downwardly from the flanges, whereby the lower bulb provides greater strength to the suspended ceiling grid member and also enhances the appearance thereof.
    Type: Grant
    Filed: December 15, 1986
    Date of Patent: January 3, 1989
    Assignee: National Rolling Mills Inc.
    Inventors: William J. Platt, Paul C. Gillenwater