Patents by Inventor David O. Martin

David O. Martin 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).

  • Overhead door and overhead door section system and method
    Patent number: 4284119
    Abstract: A novel overhead door section system and method, the section including a section facing fabricated from a high tensile steel and secured to a novel end stile and center stile. The end stile includes an angle support secured therein. The angle support clamps an end of the section facing against a front face of the end stile and is secured to ribs in the section facing and to a side wall of the end stile. A novel back facing and method provide additional strength to the panel and may also enclose an insulative layer inside the panel.
    Type: Grant
    Filed: July 23, 1979
    Date of Patent: August 18, 1981
    Assignee: Martin Overhead Door and Electronics Co.
    Inventors: David O. Martin, Lawrence G. Martin