William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7441425 | Door lock of cargo container having burglarproof function An improved door lock of a cargo container having a burglarproof function is disclosed. The door lock includes a handle hub, in which supporting pieces are integrally formed, welded to a locking rod, a rear supporting piece of the supporting pieces having a fastenin... | 10/28/2008 |
| 7360801 | Door latching system A latching system comprising a base having a first keeper secured thereto, a closable member adapted to engage the base, an elongated member rotatably secured to the closable member, said elongated member including a first connector adapted to engage the first keepe... | 04/22/2008 |
| 7331617 | Cabinet door lock A lock for a cabinet of the type wherein a door of the cabinet is movable through a frame of the cabinet is provided. An exemplary lock of the present invention includes a first and second restraining member connected by a rod and rotatable around an axis of rotatio... | 02/19/2008 |
| 7234327 | Adjustable locking mechanism for container A lockable container comprising an open-faced receptacle with a locking mechanism aperture, at least one lid covering at least a portion of the open face of the receptacle, and a locking mechanism for engaging with a padlock and securing the lid in a partially opene... | 06/26/2007 |
| 7017958 | Gate latch A latching and locking mechanism for fence gates or doors. The gate latch of this invention is comprised of a steel locking pin that slides through the latch device. When the locking pin slides out of the latch device, the gate can easily be opened or closed. When t... | 03/28/2006 |
| 7017954 | Door latch assembly A latch assembly for a trailer roll up door has a base plate, a handle and hook assembly with a locking flange rotatably mounted to the base plate, a closed keeper to selectively retain the handle in the closed position. The closed keeper is moveably mounted to the ... | 03/28/2006 |
| 6994393 | Trailer A trailer including an inner frame that is made of metal, an outer shell that is made of a non-metal and that at least partially surrounds the inner frame, and at least one wheel rotatably secured to the inner frame. In a preferred embodiment, the outer shell is mad... | 02/07/2006 |
| 6974164 | Latch device for securing cargo containers A cargo container hold down device that includes a latch and spring used in a housing defined by a base that forms a surface thereabout on which cargo container corner fittings rests in the applied relation on the container relative to the supporting structure or pl... | 12/13/2005 |
| 6902080 | Locking container A lockable container particularly suitable for storing confidential documents or recyclable material has a locking system provided by an elongate tongue that projects downwardly from the underside of the front of a hinged lid and passes through a slot in the materia... | 06/07/2005 |
| 6532778 | Double lock T-handle assembly A double lock T-handle is disclosed having a tray which includes an inwardly dished handle receiving area, a second recessed handle receiving region, and a recessed padlock receiving depression. The tray further includes a lock cylinder casing having a lo... | 03/18/2003 |
| 6397644 | Service vehicle ladder lock A service vehicle ladder lock for fastening a step or extension ladder to a conventional ladder rack running either along a side of the roof of the vehicle or across the top thereof. This ladder lock forms a rectangular framework for placement about the l... | 06/04/2002 |
| 6058748 | Security bracket A security bracket for use with a door latch mechanism of the type having a pivoting handle actuator disposed on the exterior of the door. The bracket is sandwiched between the door latch mechanism and the door and includes an opening through which the op... | 05/09/2000 |
| 6000253 | Sliding security override system A security override system for a locked box comprising a first hasp portion mounted within a box and extending through an outer door of the box; a second hasp portion connected to a bracket; the bracket slideably mounted within the box such that the secon... | 12/14/1999 |
| 5737946 | Semi-trailer anti-theft device A semi-trailer anti-theft device or apparatus is provided in the form of a shield which extends over and substantially encloses both the latch handle on the cargo door of a semi-trailer and the padlock associated with the latch. The shield includes an elo... | 04/14/1998 |
| 5257839 | Tension latch assembly A latch incorporates a latch member in the form of a leaf spring which is connected by an overcenter operating lever mechanism to a case mounted to a door for latching engagement with a strike mounted to another door or frame member. The strike incorporat... | 11/02/1993 |
| 5149153 | Self-disengaging locking device An automatically disengaging locking device is provided for use on a container having a hinged lid pivotable between open and closed positions. The locking device consists of a housing mounted to the side surface of the container, and a latch securable to... | 09/22/1992 |
| 5125697 | Lockable latch for a container A container (10) includes a base portion (12), a cover (11) and a latch assembly (13) for releasably attaching the cover (11) to the base portion (12). The latch assembly (13) includes a latch body portion (24) having lower upper end (27) pivotally connec... | 06/30/1992 |
| 5094487 | Self-disengaging locking device An automatically disengaing locking device is provided for use on a container having a hinged lid pivotable between open and closed positions. The locking device consists of a housing mounted to the side surface of the container, and a latch securable to ... | 03/10/1992 |
| 5076078 | Lock system A padlock-protecting lock system for use with a container having a movable closure. A shelf supports the padlock within the container such that only the key insertion end of the padlock is exposed for external access and a bracket having one or more depen... | 12/31/1991 |
| 5040834 | Lockable latch for a container A container (10) includes a base portion (12), a cover (11) and a latch assembly (13) for releasably attaching the cover (11) to the base portion (12). The latch assembly (13) includes a latch body portion (24) having lower upper end (27) pivotally connec... | 08/20/1991 |
| 4986578 | Door latching arrangement for an enclosure A door latching arrangement is provided for an enclosure that stores energy at each position in a range of opening positions such that if the door is manipulated to permit opening, sufficient energy is available to permit the automatic latching of the doo... | 01/22/1991 |
| 4895007 | Security device for padlocks A security device for padlocks used in conjunction with a locking mechanism for a roll-up type truck door. The security device includes a block which has upstanding projecting walls to shield the shackle and housing of the padlock and prevent tampering or... | 01/23/1990 |
| 4887854 | Gate support latch A gate latch structure is provided for use with either right-handed or left-handed gates. The latch includes a symmetrical main frame and keeper. The main frame has a striker receiving opening with two opposite cam surfaces flaring outwardly into a "Vee".... | 12/19/1989 |
| 4871203 | Reversible mount gate latch with manual latch locking A gate latch structure with a striker bar mounted on a fence gate hinge mounted on a fence. The latch structure also includes a pivot latch member pivotally mounted on a latch mounting back plate mountable on a fence post or the middle end of the other ha... | 10/03/1989 |
| 4796445 | Door locking mechanism A door locking mechanism for use with an outwardly swinging door comprising a bar permanently mounted on the inside of the door spanning the width. At each end of the bar is mounted a locking member in the form of a plate which is rotatable between a firs... | 01/10/1989 |
| 4647088 | Pilferage deterrent device for lading carrying vehicles, such as boxcars and the like Anti-pilferage device for box car doors of both the sliding and plug type in which the device is toward the top of the door out of reach of a person standing on the ground and only accessible to release the latch from the top, by a person standing on a lo... | 03/03/1987 |
| 4451072 | Gate latch A gate latch is provided for a stockade type fence. The latch may be opened from either side of the gate. Provisions are made whereby a padlock may be applied to the latch on either side of the gate. Means are provided for positively captivating the latch... | 05/29/1984 |
| 4389862 | High security locking assembly for lockrods type rear-end closures of cargo vehicles The prevalent lockrods type rear-end closures for overland cargo carrying vehicles are exceedingly vulnerable to determined thievery. The high security locking assembly of the present invention is highly deterrent to thievery and comprises a hasp includin... | 06/28/1983 |
| 4270668 | Buckle or latch for holding lid to container The disclosure concerns a buckle or latch for maintaining a lid in place on a container, such as a vacuum cleaner tank. The buckle includes a mounting bracket attached to the container. The bracket has a slot spaced down from the lid for receiving a hinge... | 06/02/1981 |
| 4114935 | Box car anti-pilferage device A box car anti-pilferage device is adapted to be mounted on a railway box car having a sliding door a sufficient distance above the rail whereby the device is usually beyond the reach of thieves standing on the ground adjacent the rail. The device include... | 09/19/1978 |
| 3998481 | Draw and pull latch A draw and pull latch consisting of a base plate for attachment to a cabinet, a body pivoted at one end on the base plate and normally covering the base plate, and a draw and pull nose pivoted on the body parallel to and spaced from the body-base plate pi... | 12/21/1976 |
| 3976315 | Gate lock A gate lock for locking a gate to a fence which comprises a first arm mounted on a fence post for rotational movement relative thereto and a second arm having a curved end portion adapted to extend around said gate post for locking the same. The arms are ... | 08/24/1976 |