Patents by Inventor David T. Penniman

David T. Penniman 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).

  • System including method and apparatus for cutting each layer of a double-layered roll of sheet to different lengths and widths
    Patent number: 5309803
    Abstract: Method and portable apparatus for separately cutting respective layers of sheet of double-layered sheets which includes a portable apparatus with a pair of adjustable upper and lower parallel cutting assemblies each having angularly oriented cutting blades for separately cutting each sheet in parallel as they are pulled through the upper and lower cutting assemblies.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: May 10, 1994
    Inventor: David T. Penniman
  • Device and method to support polyethylene or other sheeting
    Patent number: 5207403
    Abstract: An improved device for piercing and supporting sheeting from a previously installed ceiling grid molding and method for a single worker to install and seal sheeting around the periphery of a room to isolate the room for asbestos removal.
    Type: Grant
    Filed: January 13, 1992
    Date of Patent: May 4, 1993
    Inventor: David T. Penniman
  • Device to suspend polyethylene or other sheeting and components of such device
    Patent number: 5203529
    Abstract: A device to releasably suspend plastic sheeting from a building component includes a suspension member and a clamping member. The suspension member includes a ratcheted mechanism to removably affix it to a building component and a shank which incorporates both an upper fixed clamping surface of a clamping member and a number of circular ratchet teeth which are removably engaged by a lower clamping surface of the clamping member. The upper and lower clamping surfaces acting to compress and hold the sheeting without tearing the sheet.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: April 20, 1993
    Inventor: David T. Penniman