Patents by Inventor Walt Dannhardt

Walt Dannhardt 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 auxiliary locking mechanism
    Patent number: 8186194
    Abstract: A tumbler pin lock includes an auxiliary locking mechanism including an auxiliary locking pin to provide enhance locking in addition to the locking provided by the tumbler pins so that the lock remains locked even if the tumblers are picked or bumped into their unlocked positions.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: May 29, 2012
    Assignee: Medeco Security Locks, Inc.
    Inventors: Peter H. Field, David P. Sutherland, Glenn Hartman, Mark Benzie, Walt Dannhardt, Kevin Galliher, Dan Boadwine, Clyde T. Roberson
  • Cylinder Lock and Auxiliary Locking Mechanism
    Publication number: 20090241620
    Abstract: A tumbler pin lock includes an auxiliary locking mechanism including an auxiliary locking pin to provide enhance locking in addition to the locking provided by the tumbler pins so that the lock remains locked even if the tumblers are picked or bumped into their unlocked positions.
    Type: Application
    Filed: March 27, 2009
    Publication date: October 1, 2009
    Applicant: MEDECO SECURITY LOCKS, INC.
    Inventors: Peter H. FIELD, David P. SUTHERLAND, Glenn Hartman, Mark BENZIE, Walt DANNHARDT, Kevin GALLIHER, Dan BOADWINE, Clyde T. ROBERSON