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President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 5516880 | Fluid bed cooling system for polymer processing A system for the solid phase polymerization of polymers wherein cold amorphous polymer is introduced to a crystallizer and heated to crystallize the polymer, the crystallized polymer is discharged to a reactor to achieve polymerization of the polymer, and... | 05/14/1996 |
| 5499834 | Tricycle A child's tricycle comprising a pair of rear wheels, a front wheel, a seat positioned between the front and rear wheels, a support for the seat extending between the front and rear wheels, a handle for steering, and a steering fork having an upper end for... | 03/19/1996 |
| 5497562 | Radiant heater system for solid phase crystallization and polymerization of polymers A system for the solid phase polymerization of polymers comprising a crystallizer, and wherein cold amorphous polymer is introduced to the crystallizer. A source of infrared radiation is associated with the crystallizer, and the polymer is heated by apply... | 03/12/1996 |
| 5433447 | Golf ball A golf ball construction comprising a core, a cover, and an array of dimples formed on the exterior surface of the cover. The ball is characterized by a core diameter between 1.49 and 1.51 inches and by a cover thickness between 0.09 and 0.1 inches. Dimen... | 07/18/1995 |
| 5314329 | Pulse combustor ignitor system A pulse combustor ignitor comprising a small combustion chamber located external to the pulse combustion chamber. A spark ignition source such as a spark plug is associated with the chamber and separate inlets for fuel and air are provided. The fuel/air m... | 05/24/1994 |
| 5273151 | Resonant coil coin detection apparatus A coin detection apparatus is disclosed which is particularly suitable for low power applications. The coin detection apparatus utilizes a detector coil as part of a resonant circuit. The resonant circuit with no coin present in the detector coil has a da... | 12/28/1993 |
| 5271163 | System for treating flowable materials A system for treating flowable materials wherein an elongated cylindrical housing is provided with an inlet for introducing material to the housing at one end thereof. An inner wall surface is defined by the housing and the temperature of the inner wall s... | 12/21/1993 |
| 5252061 | Pulse combustion drying system A system for material drying comprising a pulse combustor and an associated combustion chamber whereby a pulsating flow of hot gases are generated. A tail pipe is connected to the outlet of the combustion chamber for receiving the pulsating flow of hot ga... | 10/12/1993 |
| 5244211 | Golf club and method of manufacture A golf club comprising an elongated shaft with a lower end for attachment of the club head. The club head comprises a hosel portion for connection of the head to the shaft end, and a main body portion which comprises an enclosed outer wall and a hollow in... | 09/14/1993 |
| 5244070 | Dual coil coin sensing apparatus An apparatus for sensing coins is disclosed which is capable of distinguishing between valid and non-valid coins as well as between the different denominations of coins. The apparatus is useful for application in coin-operated parking meters as well as ot... | 09/14/1993 |
| 5207486 | Braking system for vehicle A braking system for a vehicle which includes a master cylinder, and a wheel cylinder for braking a wheel with a brake fluid pressure supplied from the master cylinder. A pulsating-pressure absorbing apparatus is arranged between the master cylinder and t... | 05/04/1993 |
| 5201522 | Golf ball A golf ball construction wherein the dimples are distributed over the surfaces of the ball to minimize the appearance and effect of an unbroken seam line and to enhance the aerodynamic properties of the ball. The arrangement of the dimples includes a pole... | 04/13/1993 |
| 5184707 | Coin operated timing mechanism A coin operated timing mechanism for a parking meter and the like including a time display, a microprocessor for controlling the setting and operation of the display, a battery or similar self-contained power source, and a power regulation sub-system desi... | 02/09/1993 |
| 5172957 | Fluid pressure control apparatus In a fluid pressure control apparatus for a vehicle which includes a main body in which an input opening is formed in communication with a master cylinder side and an output opening is formed in communication with a wheel cylinder side, a stepped bore mad... | 12/22/1992 |
| 5156276 | Package with product display A package for the point-of-purchase display of a product wherein the package comprises a combination of a container section, a pedestal section, and a retainer section. The container section comprises bottom and top walls with upstanding side walls. One o... | 10/20/1992 |
| 5155614 | Low-power demodulating receiver with amplifier stages sharing the same bias current A low-power receiver for extracting a digital data signal from a modulated carrier signal is disclosed. The receiver employs an amplifier whose stages share the same bias current in order to reduce power consumption.... | 10/13/1992 |
| 5152271 | Fuel injection apparatus Fuel is pumped and supplied to an injector which injects the fuel in the form of mist. The quantity of fuel injected from the nozzle is regulated by quantity control means. The control means is comprised of a control valve, which is disposed on the inject... | 10/06/1992 |
| 5143339 | Speaker mounting assembly A speaker moounting assembly wherein the speaker is supported on a ceiling or wall construction. The baffle associated with the speaker includes a grille face exposed on the exterior of the ceiling or wall and an opposed interior face. Brackets are suppor... | 09/01/1992 |
| 5076922 | Water-filtration apparatus A filtration apparatus for reducing contaminants in water used for household purposes and the like. The apparatus includes a water container with a receiving reservoir mounted in the container. The reservoir houses a filter and a first passage is formed a... | 12/31/1991 |
| 5076432 | Combination package and point-of-purchase display A combination of a product and a package and point-of-purchase display unit for the product. The package and display unit includes a border section surrounding a centrally located wall section which serves as a supporting surface for the product. Retainer... | 12/31/1991 |
| 4941716 | Cabinet construction A cabinet construction defining a back panel, side panels, a front panel, an opening defined by the front panel, and a door hinged to said front panel to close said opening and to permit access to the interior of the cabinet. The cabinet is receivable wit... | 07/17/1990 |
| 4932664 | Golf ball A golf ball construction wherein the dimples are evenly distributed over the surface to minimize the appearance and effect of an unbroken seam line. The dimples are arranged in three different patterns comprising a pentagon formation at each of the poles,... | 06/12/1990 |
| 4930831 | Side extension for a toy wagon The side extension of the invention includes first and second extension wall portions each circumscribing one-half of the area defined by the upstanding walls of the wagon body. The side extensions have a groove which is engaged by a lip extending from an... | 06/05/1990 |
| 4918568 | Air quality control systems Air quality control systems for rooms or other enclosed spaces relying on generators which supply charges to particles present in the air thereby purifying or otherwise controlling the condition of the air. A source of high voltage is connected to radiati... | 04/17/1990 |
| 4880406 | Meter handle mechanism A meter apparatus wherein time is purchased upon deposit of a coin or the like for setting of a clock mechanism. A parking meter may be involved, and a rotatable handle is provided for operating a drive shaft connected between the clock mechanism and hand... | 11/14/1989 |
| 4856580 | Heat exchanger A conveying screw having a tubular helical flight attached only at its opposite end portions to a hollow conveying screw body. Heat exchange medium introduced into the hollow body is transferred along the tubular helical flight.... | 08/15/1989 |
| 4848556 | Low power coin discrimination apparatus A low power coin discriminator detects and identifies the denomination of a coin to activate a parking meter, telephone, or vending machine device. Initially the device is in a low power, dormant state. Insertion of a coin into the discrimator trips a swi... | 07/18/1989 |
| 4810099 | Mixer A mixer includes an elongated flexible sleeve that is supported in a housing in a vertical orientation and has a mixing shaft extending therein with a plurality of blade holders supported on the shaft and each blade holder supports a plurality of blades. ... | 03/07/1989 |
| 4806318 | Apparatus for purifying crystals An apparatus for purifying crystals comprises a crystal purifying tower having a transverse cross-section of two partially overlapping circles, stirrers each comprising a rotational shaft passing through the center of each of the circles and having blade ... | 02/21/1989 |
| 4804235 | Air pressure brake system for a vehicle A vehicle air brake system including a deceleration sensing device having a piston cooperating with a lever carrying a magnetic roller for operating a reed switch. Movement of the piston depends upon the magnitude of the air pressure acting on it, and suc... | 02/14/1989 |
| 4796605 | Incubator An incubator comprises an incubating chamber for accommodating an infant, and air supply means for supplying conditioned air into the incubating chamber. The air supply means comprises a dry passage and a wet passage which are partitioned from each other ... | 01/10/1989 |
| 4794872 | Apparatus and method for disposing of waste material A system for treating liquid containing waste material which includes a reaction vessel for treating other material to achieve a reaction which includes the formation of hot gases. The system includes a dryer adapted to receive the hot gases from the reac... | 01/03/1989 |
| 4793662 | Anti-skid control apparatus for a vehicle braking system An anti-skid control apparatus for a vehicle braking system includes first and second fluid pressure control valve devices for controlling the brake fluid pressure of the wheel cylinders of the front and rear wheels each arranged between respective fluid ... | 12/27/1988 |
| 4790807 | Centrifuge arrangement The invention relates to a centrifuge arrangement having a centrifuge rotor comprising a drive disc (18) connected to a drive source. Furthermore, the centrifuge rotor comprises at least one separation container (1, 32) which comprises a separation passag... | 12/13/1988 |
| 4783126 | Anti-skid control apparatus for a vehicle braking system An anti-skid control apparatus for diagonally connected vehicle wheels including control valve devices arranged between fluid pressure generating chambers of a tandem master cylinder and the wheel cylinders of the front wheels, respectively, and a control... | 11/08/1988 |
| 4776644 | Anti-skid control apparatus for a vehicle braking system An anti-skid control apparatus for a vehicle braking system in which front and rear wheels are diagonally connected, includes fluid pressure control valve devices arranged between fluid pressure generating chambers of a tandem master cylinder and brake ap... | 10/11/1988 |
| 4753493 | Anti-skid control apparatus for a vehicle braking system An anti-skid control apparatus including front and rear wheels diagonally connected with each other; fluid pressure control valve devices arranged between a tandem master cylinder and the wheels; a control unit; and a valve apparatus for generating a flui... | 06/28/1988 |
| 4744610 | Anti-skid control apparatus for a vehicle braking system A pair of front wheels are diagonally connected with a pair of rear wheels. A first fluid pressure control valve device is arranged between a first fluid pressure generating chamber of a tandem master cylinder and the wheel cylinder of one of the front wh... | 05/17/1988 |
| 4741836 | Sludge treatment process A system for extracting moisture from sludge of the type handled by municipalities and industries. The system involves the use of a feed line where the sludge is mixed with a chemical treating agent adapted to achieve flocculation. The sludge is conveyed,... | 05/03/1988 |
| 4740040 | Anti-skid control apparatus for a vehicle braking system An anti-skid control vehicle braking apparatus with pairs of front and rear wheels; wheel speed sensors associated with the wheels; first and second fluid pressure control valve devices for respectively controlling the brake fluid pressure of the wheel cy... | 04/26/1988 |
