Patents by Inventor William Turnbo

William Turnbo 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).

  • Lever activated deadbolt lock with deadlock feature
    Patent number: 8001813
    Abstract: To prevent intruders from forcing a deadbolt out of a locking position, the deadbolt has a sleeve defining inside and outside slots. Each of these slots has a horizontal section and a locked position vertical section. Cross members extend through the slots and are placed in the locked position vertical sections when the deadbolt is in the locked position. This prevents the deadbolt from being forcibly unlocked.
    Type: Grant
    Filed: April 24, 2008
    Date of Patent: August 23, 2011
    Inventor: William Turnbo