Patents by Inventor Norman D. Calvert

Norman D. Calvert 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).

  • Power screw gun with hammer head
    Patent number: 8132486
    Abstract: A pneumatic power screw gun with a reinforced hammer head, has a reinforced base end above the handle with a cradle mounted thereon, the cradle being adapted to receive and secure a hammer head in place as desired.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: March 13, 2012
    Inventor: Norman D. Calvert
  • POWER SCREW GUN WITH HAMMER HEAD
    Publication number: 20080301880
    Abstract: A pneumatic power screw gun with a reinforced hammer head, has a reinforced base end above the handle with a cradle mounted thereon, the cradle being adapted to receive and secure a hammer head in place as desired.
    Type: Application
    Filed: June 11, 2007
    Publication date: December 11, 2008
    Inventor: Norman D. Calvert