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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 |
| 6986523 | Adjustable boat trailer step assembly A boat trailer step assembly is provided with several features making the assembly adjustable in several respects, allowing the step to be placed at varying positions for different trailers and boats. The step is mounted on a support member made of overlapping parts... | 01/17/2006 |
| 6941584 | Universal earth suit A jump suit having features effective for both male and female users includes a central zippered opening extends downward from waistband along the crotch between left and right pants legs. A main zipper controlled by a pair of keepers and opens and closes the openin... | 09/13/2005 |
| 6905417 | Automatic pool cue tip tapper A pool cue tip conditioning device has a striker plate carrying tip-indenting fingers on its bottom side, the plate located for being driven into a pool cue tip to indent the tip without damaging it. The striker plate is driven by a plunger controlled by a return sp... | 06/14/2005 |
| 6725874 | Delayed triple pressure flow valve A delayed triple pressure flow valve for controlling the hydraulic fluid passing to two work stations. ... | 04/27/2004 |
| 6705510 | Valve housing fabrication process enabling complete coverage of joint surfaces with protective coating A value housing having overlapped inner and outer members is fabricated by a process including placing the members in position where one side of the joint is accessible for welding and the opposite side is inaccessible, single welding from the accessible side and br... | 03/16/2004 |
| 6701867 | Birdfeeder with self cleaning connection mechanism A birdfeeder is made up of two subassemblies, one of them having a protective top and a lock rod extending downward from the center of the top and the other having a base with a cavity for receiving and holding bird feed, along with a reservoir, a tubular... | 03/09/2004 |
| 6694664 | Fishing lure retriever A device for retrieving snagged lures has a rigid loop of stiff rod or wire mounted on a pole. The loop is made up of several portions placed in the same plane with one another and connected to a support portion mounted in the pole. The loop has first and... | 02/24/2004 |
| 6648727 | CNC dual workhead chucker grinder A grinding machine has an abrasive wheel mounted on a spindle carried by a wheelhead which provides for movement in a direction perpendicular to the spindle. A pair of workheads are separately mounted on workslides and cross slides so that the workheads m... | 11/18/2003 |
| 6619945 | Apparatus for forming structural blocks from compactible materials A machine for making building blocks from compactible materials such as earth, in a rapid and facile manner. A mold is provided in which the blocks of desired configuration, typically rectangular, are formed. A hydraulic ram, assisted by a pressure intens... | 09/16/2003 |
| 6605765 | Acoustic guitar with internally located cassette tape player An acoustic guitar is combined with a cassette tape player carried inside of the body of the guitar and arranged for playing recorded music simultaneously with live music being played on the guitar by a musician. Necessary switches, wiring, and power supp... | 08/12/2003 |
| 6601589 | Hair tie and fastener A hair tie and fastener device has a cord formed into a loop, with one end of the cord stopping at the loop and the other end extending outward. The short end is formed into or connected to a restraining mechanism which controls reversible movement of the... | 08/05/2003 |
| 6596949 | Tank weighing assembly with integrated tank mount and load cell A tank weighing assembly includes a shear-web load cell in the form of an annular disk, a supporting base plate and components for mounting the load cell in a manner such as to enable compensation for effects of exposure to forces of the wind and thermal ... | 07/22/2003 |
| 6550109 | Button latch A device for enhancing the fastening of the top button of a dress shirt comprises a latch member having a tab portion and a hook portion. The tab portion is adapted to be sewn to the button hole placket at the top of the shirt so that the hook portion may... | 04/22/2003 |
| 6532594 | Protective insert pad for ball glove A protective insert for placement underneath a baseball or softball glove takes the form of a flat circular disk of a high density microcellular urethane padding material. The disk has an internal cutout pattern of two inverted v-shaped channels which enc... | 03/18/2003 |
| 6524193 | Golf putter head A golf putter head has a cylindrical body with a defined flat face on top, the body made up of an outer shell of an aluminum alloy and an inner core of brass. The head has a groove across the flat face of the top and at its center, with indicator material... | 02/25/2003 |
| 6511275 | Drywall panel carrier attachable to lift platform Apparatus for lifting and transporting drywall panels on a lift platform has a pair of panel-supporting legs of square metal tubing attachable to side rails of a lift platform. Each of the legs is connected to the rails by an upper clamp at the top of the... | 01/28/2003 |
| 6488049 | Super sensitive, full flow, adjustable pressure valve A high volume pressure valve accurately adjustable to within 0.25 PSIG for attachment to a pipe outlet. A flanged valve body and a cap are connected by a compression spring to permit the opening of the valve when the predetermined outlet pressure setting ... | 12/03/2002 |
| 6454290 | Trailer hitch alignment device A trailer hitch alignment device has a base block for placement on the coupler of a trailer. The block has a magnet at its bottom for being connected to the coupler and a series of apertures directed at varying angles to receive an upright post inclined a... | 09/24/2002 |
| 6446441 | Magnetic refrigerator A magnetic refrigeration system uses high-temperature side thermal diode modules with magnetocaloric material placed inside of hermetically sealed module containers. The material in the form of a porous matrix. The material comes into direct thermal conta... | 09/10/2002 |
| 6409556 | Variable height outboard motor mount apparatus A motor mount for connecting an outboard motor to the transom of a boat includes mechanisms for raising and lowering the height of the motor with respect to the transom. The mount has an upper bracket and a lower bracket, each having upper and lower recta... | 06/25/2002 |
| 6390239 | Tree stand theft prevention device A theft prevention device for fixed-position tree stands employs a horizontal plate with ends bent over to engage a pair of upright supports of the tree stand. The plate has a hole at a central location through which a lag bolt extends, securing the plate... | 05/21/2002 |
| 6289930 | Refrigerant expansion device having combined piston orifice valve and solenoid-actuated closure A refrigerant expansion valve for an air conditioning system is combined with a solenoid-actuated closure device in a common housing. The housing provides for placement of the solenoid valve in a position to shut off fluid flow across the expansion device... | 09/18/2001 |
| 6241204 | Paint bucket holder for hollow rung ladders A paint bucket holder that holds a paint bucket firmly and securely is safely, securely, and removably attached to a hollow rung ladder. A paint bucket container, including a base, upright panel, and side braces, provides a seat and perpendicular support ... | 06/05/2001 |
| 6223623 | Idle stop mechanism for foot-operated outboard motor throttle An idle stop for a certain type of motor boat throttles. The throttles involved have a pedal pivotally mounted on a base, an eccentric carried by the base and actuated by the pedal and a receptor mount connected to a side wall of the base. The idle stop i... | 05/01/2001 |
| 5444112 | Sprayable nonionic neoprene latex adhesive and method of preparation A sprayable adhesive based on nonionic neoprene latex includes in the adhesive mixture a nonionic surfactant, along with the latex, which is a copolymer of chloroprene and methacrylic acid stabilized with polyvinyl alcohol. The adhesive also includes a ta... | 08/22/1995 |
| 5413825 | Artificial Christmas tree A collapsible artificial Christmas tree has a center pole erectable on a base, a cap that fits over the top of the pole, and a spiral coil of split plastic tubing, which extends upward to form a conical shape when the cap is placed on the pole. The split ... | 05/09/1995 |
| 5396754 | Tractor-mounted articulated arm and trimmer attachment An articulated arm and cutter attachment for mounting on a tractor has a pair of elongated vertical booms pivotally connected to one another at their top ends. The lower end of one of the booms is pivotally connected to a beam extending laterally from und... | 03/14/1995 |
| 5388340 | Stair layout square with adjustable rake bar A square for laying out and marking run and rise lines on supporting stringers for a staircase has a rake bar connected to slots near the ends of blades of the square. Markings showing a range of horizontal run distances are placed on the outer edge of th... | 02/14/1995 |
| 5375275 | Portable shower and catch basin assembly for chemical decontamination A portable shower and catch basin assembly for use in performing chemical decontamination procedures has a catch basin made of a highly effective chemical barrier fabric and a support framework of plastic tubing parts that may be erected quickly on site. ... | 12/27/1994 |
| 4942707 | Load-bearing roof or ceiling assembly made up of insulated concrete panels A three-layer insulated concrete panel includes as the middle layer an insulating slab having grooves which provide a form for casting of concrete supporting ribs integral with a layer of concrete cast over the grooved face. A layer of material, such as p... | 07/24/1990 |
| 4932587 | Mailbox with tiltable mail retrieval means Apparatus that enables easy retrieval of mail from a rural mailbox is disclosed. A horizontally disposed mail-supporting member, which may be the bottom of the box itself or an insertable tray, is arranged to be tilted by pivoting around a transverse axis... | 06/12/1990 |
| 4932313 | Air bearing piston and cylinder assembly A piston for a gas-operated linear actuator wherein a double-acting piston moves axially within a cylinder in response to gas pressure applied intermittently to chambers on either side of the piston. The piston has reservoirs in the form of holes in each ... | 06/12/1990 |
| 4909051 | Keeper plate for strap handcuffs a keeper plate for use with strap handcuffs is disclosed. The plate in one embodiment for a single handcuff is generally rectangular, with flattened concave edges disposed on its longer sides and strap-receiving channels extending through its shorter side... | 03/20/1990 |
| 4908252 | Pleasant-feeling fragrance sampler containing microcapsules A fragrance sampler for delivering and dispensing perfumes is disclosed. The sampler includes a sheet of synthetic pile fabric or other fabric with similar tactile properties having embedded therein microcapsules containing a fragrance oil. The fabric mat... | 03/13/1990 |
| 4906488 | Modification of permeant Forming a solution (preferably a true or complete solution) of mer in any permeant, reacting mer in presence of permeant substantially without rearrangement of the liquid system into separate phases and substantially without encapsulation (defined as any ... | 03/06/1990 |
| 4843675 | Two piece removable-curtain grommet An annular grommet for supporting lightweight curtains for sliding on a rod has mating halves with flat surfaces. One half has one or more alignment tines extending from the flat surface between its edges at one end and engagement tines at its inner edge ... | 07/04/1989 |
| 4738831 | Method and apparatus for growing crystals A crystal growth apparatus (10) having a heated spherical growth container (12) is filled with a crystalline material in solid or liquid form. The crystalline material is heated by resistance heating wire (58) to a predetermined temperature, whereupon the... | 04/19/1988 |
| 4452412 | Space shuttle with rail system and aft thrust structure securing solid rocket boosters to external tank A space shuttle system (11) having an orbiter spacecraft (16) with main rocket engines (43) a large external propellant tank (12), and two solid rocket boosters (13,14). The propellant tank (12) has a forward pressure vessel (19) for liquid hydrogen and a... | 06/05/1984 |
| 4451017 | Three stage rocket vehicle with parallel staging A three stage rocket vehicle (11) having a large forward propellant tank (12) and a small aft propellant tank (13) axially aligned. Secured to the rear end of the aft propellant tank (13) is an engine mount structure (14) carrying rocket engines (15). Off... | 05/29/1984 |
| 4447251 | Sonic levitation apparatus A sonic levitation apparatus (A) is disclosed which includes a sonic transducer (14) which generates acoustical energy responsive to the level of an electrical amplifier (16). A duct (B) communicates with an acoustical chamber (18) to deliver an oscillato... | 05/08/1984 |
