Patents by Inventor Michael William Lockhart

Michael William Lockhart 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).

  • Lightweight safety spectacles
    Patent number: 6082857
    Abstract: Lightweight safety spectacles have a lens portion and two wing portions formed from a thin sheet of polycarbonate. A flange extends forwardly of the top edge of the lens portion, and a browguard of thin sheet aluminum is fixed to the flange by indentation of one of the opposed faces of the browguard by pin punches.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: July 4, 2000
    Inventor: Michael William Lockhart