Patents by Inventor Greg N. Brandt

Greg N. Brandt 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).

  • Cylinder lock and key
    Patent number: 5615566
    Abstract: An improved security cylinder lock and key for operating the cylinder lock are disclosed. The cylinder lock has conventional tumbler locking structure and a secondary locking bar that operates independently of the tumblers. The secondary locking bar prevents operation of the cylinder lock until a properly configured key is placed in the keyway of the cylinder lock.
    Type: Grant
    Filed: September 18, 1995
    Date of Patent: April 1, 1997
    Inventor: Greg N. Brandt
  • Cylinder lock and key
    Patent number: RE39364
    Abstract: An improved security cylinder lock and key for operating the cylinder lock are disclosed. The cylinder lock has conventional tumbler locking structure and a secondary locking bar that operates independently of the tumblers. The secondary locking bar prevents operation of the cylinder lock until a properly configured key is placed in the keyway of the cylinder lock.
    Type: Grant
    Filed: November 24, 2003
    Date of Patent: October 31, 2006
    Assignee: Stanley Security Solutions, Inc.
    Inventor: Greg N. Brandt