Patents by Inventor Mark L. Silberberg

Mark L. Silberberg 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).

  • Bubble level
    Patent number: D509158
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: September 6, 2005
    Assignee: Precision Designed Products, Inc.
    Inventor: Mark L. Silberberg
  • Mini laser level
    Patent number: D538186
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: March 13, 2007
    Assignee: Precision Designed Products, Inc.
    Inventor: Mark L. Silberberg