Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 7353672 | Lock assembly A lock assembly includes a plurality of lock devices and a locking chain. Each lock device includes: a lock housing unit including upper and lower lock housings respectively formed with a rod hole and a jaw hole; a jaw actuating unit including a jaw actuator operabl... | 04/08/2008 |
| 7334824 | Door lever lock A child safety lock for a lever door handle is rotatably mounted on a first side of a door and is biased in a first position. The child safety lock has a holder adapted to engage the door handle so that rotating the door handle rotates the holder. A cover is pivotal... | 02/26/2008 |
| 7331203 | Merchandise lock A merchandise lock has a shell, an external sleeve, an internal sleeve, at least one stationary locking sheet and a movable locking sheet. The external sleeve is mounted on an end of the shell. The internal sleeve is mounted in the shell and the external sleeve. The... | 02/19/2008 |
| 7270354 | Locking device A locking device having an upper portion, a lower portion, and a locking arm prevents a closed door from being opened. The locking arm is pivotably mounted to the lower portion of the locking device and positioned in cavities of the upper portion and the lower porti... | 09/18/2007 |
| 7251970 | Cylinder housing arrangement A cylinder housing arrangement, where the cylinder housing encloses a lock cylinder or the like, which comprises a number of locking elements to be arranged by a key, preferably tumbler discs to be turned by a key, which discs in their locked position prevent the tu... | 08/07/2007 |
| 7234326 | Lock device A lock device includes a lock housing unit, a jaw actuating unit, and a jaw unit. The lock housing unit includes an upper lock housing formed with a rod hole, and a lower lock housing formed with a jaw hole. The jaw actuating unit includes a jaw actuator operable to... | 06/26/2007 |
| 7197904 | Lockout device A telescoping lockout device for encasing a gate valve, electrical connection, or similar apparatus, for the purpose of preventing unauthorized access and tampering with the apparatus. The lockout device is comprised of two nested half cylinders attached to one anot... | 04/03/2007 |
| 7181939 | Key assembly A key assembly includes a key, a cap and a fastener to selectively secure the cap to the key. The cap may include an opening for receiving a key ring, or other structure, therethrough. In one embodiment, the key includes a grip, and the cap and grip cooperate to enc... | 02/27/2007 |
| 7143614 | Computer physical security device An apparatus which inhibits the theft of equipment such as personal computers is disclosed. The equipment must have an external wall provided with a specially designed, approximately rectangular slot having preselected dimensions. An attachment mechanism includes a ... | 12/05/2006 |
| 7131302 | Keyway plug for safe deposit locks A keyway plug that discretely provides a device for preventing a person from unlocking a tumbler lock even if the correct key is used. The present invention includes a plug member that is sized to fit entirely within a keyhole and is effective to block a key from be... | 11/07/2006 |
| 7000955 | Portable casement window securing device A compact, portable device for effectively locking a crank window in a user selected position. The body of the device can be selectively secured to or released from a window crank. When secured to the window crank, the device limits rotation of the crank by mechanic... | 02/21/2006 |
| 6931898 | Tool for releasing a locking cylinder A tool for unlocking a locking cylinder, with a tumbler consisting of a plurality of spring-loaded locking bodes that can be displaced crosswise to the rotational axis of the locking cylinder. The tool comprises a rotating part (1) provided with two driver no... | 08/23/2005 |
| 6854307 | Lock-picking prevention apparatus A lock-picking prevention apparatus is adaptable to a lock (120) having a lock hole (121) and an abutment driver pin (122) for restricting and releasing a key. The apparatus includes a locking body (102) having a front end abutment hook (... | 02/15/2005 |
| 6463770 | Lock for a computer A lock for a computer has a housing, a core pivotally mounted to the housing, a latch formed on and extending out of the core, a rod coupled to the core. The rod has a flange end and a pair of pins extending from the flange end. A spring is disposed aroun... | 10/15/2002 |
| 6397649 | Keyhole barrier system and method A keyhole barrier system for use with tumbler locks containing a keyway and a plurality of tumblers. The system contains a keyhole block having both retention and signaling portions. The retention portion prevents removal of the keyhole block from the loc... | 06/04/2002 |
| 6305200 | Keyway plug A keyway plug that provides a means for preventing the correct key from opening a tumbler lock, including a plug and an extractor. The plug fits into the keyway to block complete insertion of a key. An arm extends from the tip of the plug across the tumbl... | 10/23/2001 |
| 6272891 | Keyway plug for double-sided keyways A keyway plug that provides a device for preventing the correct key from opening a double-sided tumbler lock, including a plug and an extractor. The plug fits into the keyway to block complete insertion of a key. In one embodiment, a pair of arms extend f... | 08/14/2001 |
| 6122945 | Keyless door knob security device with stabilizer arm A new keyless door knob security device with stabilizer arm for preventing access to a keyhole of a door knob to prevent unauthorized access. The inventive device includes a central shaft that has first and second ends and a longitudinal axis extending be... | 09/26/2000 |
| 5950466 | Keyway plug A keyway plug that provides a means for preventing the correct key from opening a tumbler lock, including a plug and an extractor. The plug fits into the keyway to block complete insertion of a key. In one embodiment, an arm extends from the tip of the pl... | 09/14/1999 |
| 5806350 | Anti-theft device An anti-theft device has a substantially cylindrical body composed of two semi-cylindrical shells, and structure for hingedly connecting the shells with one another at one circumferential end so that the shells are turnable between an open position in whi... | 09/15/1998 |
| 5560235 | Lockable doorknob enclosure A lockable doorknob enclosure for use on doorknobs of the type having a knob attached to a shaft having a longitudinal axis. The lockable doorknob enclosure comprises: a containment structure having a sealable cavity for enclosing the doorknob and a porti... | 10/01/1996 |
| 5461891 | Apparatus for secure positioning over and around a steering wheel and steering column to prevent theft An apparatus for secure positioning over and around a steering wheel and steering column to prevent theft. The apparatus comprises a plate positionable over the top of a central part of a steering wheel having a steering column with laterally extending ro... | 10/31/1995 |
| 5431033 | Steering wheel and ignition locking device for a vehicle An anti-theft device for a vehicle that includes a combination of a steering wheel lock and an ignition cover to prevent access to the ignition and to prevent use of the steering wheel or access to the steering wheel center hub when the device is in place... | 07/11/1995 |
| 5343721 | Ignition locking device A device is disclosed for locking the key ignition of a vehicle. The device includes braided cables encased in neoprene rubber, and a recess is provided at the midpoint of the length of these cables. A locking housing is basically cylindrical in shape and... | 09/06/1994 |
| 5291762 | Armored collar A theft protection collar is provided for a motor vehicle having a steering column with an ignition switch and shift lever and consists of a bracket which is removably connected and located to the steering column. The bracket covers and protects the ignit... | 03/08/1994 |
| 5203187 | Portable door lock closure The present doorlock closure secures existing doors having conventional doorknobs against entry by enveloping the doorknob with opposed cavity compartments of knob confining segments. Upper and lower housing segments are hinged together such that they may... | 04/20/1993 |
| 5201202 | Door lock security device A door lock security device is disclosed for locking over the shaft of a door lock rotary knob or a door knob. The device comprises an inner cover which is further comprised of first and second shell portions having an opening between them for closing aro... | 04/13/1993 |
| 5119651 | Steering lock with ignition switch blocking means A steering lock with a lock body having an attached extensible member for adjusting the distance between two locking rods which are connected in parallel through a telescopic tube to form a shackle. The shackle can be extended when clearance is required, ... | 06/09/1992 |
| 5063766 | Lockable keyway cover A lockable cover for the keyway of a cam-type lock, including an annular skirt attached to the body of the cam lock adjacent the inward end of the front-key way end of the lock. There is locking means for engaging the annular skirt, which locking means is... | 11/12/1991 |
| 4955215 | Anti-theft steering column cuff device for automobiles and the like An anti-theft steering column cuff device for automobiles and the like is provided and consists of two box shaped casings which are removable connected and locked to the steering column in which one of the casings covers and protects an ignition switch to... | 09/11/1990 |
| 4899564 | Doorknob security device The present invention entails a doorknob security device for preventing access to the outer surface of the doorknob and particularly to a keyhole or other locking and unlocking mechanisms formed about the surface of the knob. In particular, the security d... | 02/13/1990 |
| 4798066 | Automobile ignition lock cover with chain and bracket mounting An automobile ignition lock cover for steering column-mounted ignition locks includes a hollow cover housing having an open side to fit over the ignition lock. An L-shaped bracket has a first portion disposed inside the housing and fixed to the back wall ... | 01/17/1989 |
| 4798069 | Protecting device for lever handle door locks A protection device useful for preventing access to a cylinder key lock on a lever handle handle door lock incorporates a first and second half which are joined together along a junction to form a united body. The united body has a closed bottom wall and ... | 01/17/1989 |
| 4718261 | Safety armature for a door lock A safety armature for a cylinder having a key aperture or keyway, comprises a safety element which is in the form of a magnetically encodeable closure which can be opened by a magnetically coded disk and, which, in its locked position, covers the key aper... | 01/12/1988 |
| 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 |
| 4578970 | Portable, removable, door knob mounted, door locking apparatus This invention provides a method and apparatus for preventing an ordinary door knob from being rotated, thus preventing the plunger-type bolt from disengaging from the striker plate and plunger pocket in the door jamb. The apparatus is attached to the sha... | 04/01/1986 |
| 4570470 | Door lock security device The subject invention is a door lock security device adapted to provide a means for preventing a doorknob lock from being opened by a master key or other means through the keyhole while the room is locked from the outside, such device comprising a cover m... | 02/18/1986 |
| 4494391 | Automobile security device for steering column ignition locks An automobile security device for protecting an ignition lock mounted in an automobile steering column. The device includes a hollow cover to fit over the lock on the steering column, and a flexible tension-bearing element, preferably a link chain, for se... | 01/22/1985 |
| 4463584 | Protecting device for padlocks or other similar locks A protection device of the type useful for preventing access to a padlock or small combination lock as well as serving as a container for keys, incorporates a first and second half which are joined together along a junction to form a united body. The unit... | 08/07/1984 |
| 4462233 | Detachable guard for keyholes A detachable guard or cover for preventing access to the keyhole of cylinder type locks in the face of a wall or locked door of a tool cabinet is combined with openings in the wall on each side of said keyhole. The guard comprises a generally U-shaped bod... | 07/31/1984 |
