Patent RE39364 was granted and assigned to STANLEY Security (company) on October, 2006 by the United States Patent and Trademark Office.
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.