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| Number | Title | Issue Date |
| 7418847 | Compact folding deadbolt restrictor An apparatus for preventing a deadbolt lock from being opened from the outside of a door with a key. The base is constructed from resilient material, the base defining at least one aperture for receiving one of a plurality of types of finger actuator in one of a plu... | 09/02/2008 |
| 7284400 | Deadbolt lock knob immobilizer Apparatus is simply hung on a deadbolt knob when the deadbolt is in locked position. It prevents the deadbolt knob from rotating enough to retract the deadbolt. This ensures that the door cannot be unlocked from the outside. A passage in an upper end of the apparatu... | 10/23/2007 |
| 7117701 | Devices, methods, and systems for keying a lock assembly Certain exemplary embodiments of the present invention provide a lock keying system comprising: a lock cylinder comprising: a cylinder body; a plug assembly disposed in the cylinder body and comprising a plurality of pins and a one-to-one corresponding plurality of ... | 10/10/2006 |
| 6189347 | Training handcuff key A training handcuff key for use during training of security officers in the use of handcuffs used to restrain a subject. The training key includes a magnet washer that holds the key adjacent the surface of the handcuff keyhole, even during violent jerking... | 02/20/2001 |
| 6182485 | Super grip fabric lock A deadbolt security attachment, removably installable on a deadbolt latch handle by an occupant within a room or structure, made up of a flexible strap which secures to the deadbolt handle, is wrapped about the shank of a doorknob, and is extended to secu... | 02/06/2001 |
| 6082160 | Anti-key insertion device A reminder device attachable to a key ring and engageable with a key shaft to prevent the utilization of the key and thus remind the user of a task to be performed. The device is designed from a single piece of clear flexible plastic, which can be repeate... | 07/04/2000 |
| 5517838 | Portable pick-proof deadbolt attachment A portable deadbolt lock security device is configured to prevent the handle of the deadbolt lock from being turned. The device includes a flexible strap having a first end, a second end, and a medial portion. An opening is located in the first end of the... | 05/21/1996 |
| 5309743 | Door unlocking device An object of this invention is to provide a door unlocking device adapted unlock a door by transmitting a signal in the air through a signal transmitter, which can unlock the door even when the power source of the signal transmitter, namely, the battery h... | 05/10/1994 |
| 5007263 | Security device The present invention relates to an improved security device. The improved security device includes a U-shaped member which is designed to engage the shaft of a doorknob. Attached to the U-shaped member is a locking plate which has openings therein to rec... | 04/16/1991 |
| 4704881 | Barrel lock assembly A barrel lock assembly for use in securing a lock housing over the latch or access point of a securable enclosure, such as a utility meter box, is disclosed, having a bar member with a stop on the distal end for engaging a surface on the lock housing or o... | 11/10/1987 |
| 4641509 | Master keyboard A master key board device for the retention, protection, and control of keys. The device is preferably wall mountable, having a face plate containing slots for a desired number of keys. Each key slot has an associated locking device which is controlled by... | 02/10/1987 |
| 4426859 | Anti-theft auto lock Disclosed is an auto anti-theft ignition switch lock for preventing unauthorized access to the ignition switch which is mounted on the steering column of most conventional automobiles. The ignition switch lock includes a housing, one end of which is shape... | 01/24/1984 |
