Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4237911 | Dental product The invention provides a dental product for maintaining oral hygiene which comprises a cellular stem arranged to clean exposed tooth surfaces. The product also comprises a fin for cleaning between adjacent pairs of teeth. It also contains dental fluoride ... | 12/09/1980 |
| 4225298 | Apparatus for removing warps or surface irregularities from polyvinyl phonograph records Method and apparatus for removing warps or surface irregularities from polyvinyl phonograph records by exerting forces vertically and/or laterially on a record. The apparatus includes a plurality of plate-like members which are used to engage with the lea... | 09/30/1980 |
| 4224278 | Apparatus for performing tests and measurements on liquid samples An apparatus for performing tests and measurements on liquid samples comprises three identical juxtaposed stationary trays each provided with a plurality of receptacles for the samples to be examined. The receptacles are integrally molded in the trays. Th... | 09/23/1980 |
| 4218595 | Composite switch device mounted to the steering shaft of automobiles A composite switch device mounted to the steering shaft of an automobile and integrally provided with several switches such as a turn indication switch, a lighting switch, and a wiper and washer switch, wherein one end of each contact plate in each of the... | 08/19/1980 |
| 4217869 | Method of controlling the air-fuel ratio of an air-fuel mixture provided for an internal combustion engine and a system for executing the method A part of an engine air-fuel mixture is admitted from the intake passageway into a space and is burned to produce combustion gases for sensing the air-fuel ratio of the admitted air-fuel mixture and for controlling the air-fuel ratio of an engine air-fuel... | 08/19/1980 |
| 4216411 | Underwater light assembly with low-water cut-off A wet-niche type lamp for providing underwater illumination in a swimming pool or the like includes an over-temperature protection circuit which interrupts the supply of electrical energy to the lamp when the level of the cooling water surrounding the lam... | 08/05/1980 |
| 4216014 | Low temperature steel alloy Low temperature steel alloys having a high toughness and hardness, consisting essentially of from 0.20 to 0.30 wt % of carbon, from 1.20 to 2.00 wt % of silicon, from 0.30 to 0.80 wt % of manganese, from 1.70 to 2.40 wt % of nickel, from 2.50 to 3.50 wt %... | 08/05/1980 |
| 4215254 | Pressure switch with resiliently mounted contact A high-quality pressure switch comprising a member moving according to pressure applied and a moving contact piece to act as a switch. The member has an end portion contained in a switch case to engage with said moving contact piece and remain in touch wi... | 07/29/1980 |
| 4213816 | Method for bonding porous coating to rigid structural member A method for bonding a layer of porous polymeric material to a rigid implantable portion of a prosthetic device, which includes the steps of (a) forming a substrate by coating the implantable portion with material which is chemically compatible with the p... | 07/22/1980 |
| 4212365 | Articulating mine car coupling An articulating coupling for connecting two wheeled vehicles includes a pivot connection and a tilt mechanism. The pivot connection is provided between the two vehicles so that they can turn relative to each other in the horizontal plane and be selectivel... | 07/15/1980 |
| 4211027 | Elongated flexible fishing lure with helical shape A fishing lure includes a hook, a swivel, a line portion connected between the hook and swivel and a length of flexible tubing at least 7" long around the line portion and portion of the hook connected to the line portion. The hook includes a barbed end p... | 07/08/1980 |
| 4209714 | Logarithmic amplifier A logarithmic amplifier comprising a common-emitter type transistor amplifier circuit with an emitter resistor and a collector load. A bias voltage is applied to the base of the transistor through a diode so that the overall input-output transfer characte... | 06/24/1980 |
| 4207716 | Receptacle having a circumferentially pre-stressed peripheral wall composed of concrete slabs In a large size receptacle, e.g. for a mixture of liquid and solid manure, the peripheral wall comprises a circular series of reinforced concrete slabs having a plain external surface and presenting, at each vertical joint between successive slabs, groove... | 06/17/1980 |
| 4207480 | D.C. Amplifier with improved characteristics with respect to temperature A D.C. amplifier for low-level currents includes an input stage having first and second cascode mounted transistors and a bis circuit adapted to maintain the base and collector potentials of the first transistor very close to each other over a predetermin... | 06/10/1980 |
| 4207099 | Product and process for non-dusting aluminum grain A new aluminum grain, together with a process for its preparation, suitable for use in blasting agents is described. The grain, obtained by shearing sheet material of various types with a modified cutter comprises largely flat particles with jagged edges,... | 06/10/1980 |
| 4206693 | Chimney cowls A chimney cowl has a vertically-spaced series of five annular vanes centered on a common vertical axis. The vanes are carried by three supports equi-spaced around the inner peripheries of the vanes, the supports mounting co-axially with said vanes and bet... | 06/10/1980 |
| 4202414 | Lawn cultivating machine A lawn cultivating machine comprising two parallel cutter shafts which are onnected together by a transmission gear and are rotatable about their axes, and on each of which shafts a plurality of cutters are arranged at spaced intervals from each other, the... | 05/13/1980 |
| 4201503 | Thread reconditioning tool A tool for reconditioning or restoring the threads of externally threaded members, such as bolts, studs, and the like, includes, in one embodiment, a collet having a bore formed therethrough with a portion of the bore defining a guide surface, and a threa... | 05/06/1980 |
| 4198054 | Automatic golf ball teeing device An automatic golf ball teeing apparatus comprised of a chamber placed beneath the ground. A hollow piston is mounted in the chamber for vertical movement between first and second positions. Mounted within the piston is a pair of vertically spaced apart me... | 04/15/1980 |
| 4197568 | Corona generating apparatus A corona generating apparatus for use in an electrophotographic copying machine is disclosed, which includes an elongated shield of a conductive net member defining an open ended chamber and a corona discharge electrode mounted in the chamber. The conduct... | 04/08/1980 |
| 4197455 | Metal vapor source with a regulatable flow and to an ion analyzer equipped with such a source A metal vapor source with a regulatable flow rate comprising an enclosure filled with said vapor, means for heating said enclosure to a first temperature, a tube connected to the enclosure and means for heating said tube to a second regulatable temperatur... | 04/08/1980 |
| 4197273 | Apparatus for controlling the directional solidification of a liquid-solid system The growth of a solid obtained by cooling a liquid solution is observed and controlled by measuring the variation in volume of the solid-liquid system at the time of solidification. The method is applicable to the control of oriented crystallization from ... | 04/08/1980 |
| 4196709 | After burning preventive system for an internal combustion engine The accumulator chamber communicates with the atmosphere through a passage which is formed therein with a restriction for restricting the cross sectional area of the passage or which is provided therein with a pressure control valve for opening the passag... | 04/08/1980 |
| 4196322 | Rear window washer wiper operating switch A rear window washer wiper control comprising a first movable member and a second movable member, the movable members comprising a slide switch for a washer circuit and a slide switch for a wiper circuit. Both switches are incorporated in one case to ener... | 04/01/1980 |
| 4194012 | Fermented feed for ruminants and process for producing same A feed for ruminants is produced by mixing 90-99.5% by weight of a vegetable fiber material which is indigestible by ruminants and 0.5-10% by weight of a non-protein nitrogen compound and inoculating the mixture with an effective amount of an alcoholic fe... | 03/18/1980 |
| 4193960 | Method of forming a bearing contactor A method for forming a contactor adapted to transmit oil from a reservoir of oil-impregnated wicking material formed of a fluent mixture of oil and oil retaining particles to a bearing surface, includes the steps of filling a mold cavity of a predetermine... | 03/18/1980 |
| 4193003 | Method for controlling the migration of a chemical species within a solid substrate The method for controlling the migration of an electronegative chemical species within a solid substrate which exhibits ionic conduction consists in irradiating the substrate with electrons which have sufficient energy to penetrate into the substrate and ... | 03/11/1980 |
| 4192278 | Internal combustion engine for motor vehicle An internal combustion engine of the type wherein a particular group of engine cylinders are not supplied with air-fuel mixture during light load engine operation, comprises a gas supply device for supplying exhaust gas or fresh air into the particular gr... | 03/11/1980 |
| 4191422 | Adjustable headrest An adjustable headrest for a vehicle seat comprises a stationary guide rail, a slide rail slidable along the guide rail forwardly and backwardly of the seat among several adjusting positions, and means locking the slide rail in one of the adjusting positi... | 03/04/1980 |
| 4191134 | Fluid injection system and method for an internal combustion engine A fluid injection system and method for an internal combustion engine such as a spark-ignition or compression-ignition engine in which an injection nozzle injects a finely divided spray of fluid, such as water or a water solution, into the engine in respo... | 03/04/1980 |
| 4186694 | Temperature control system of an engine exhaust gas component sensor A jacket conduit which surrounds the exhaust gas at a portion equipped with an engine exhaust gas component sensor and is spaced from the exhaust gas conduit to define an air chamber on same and is formed with an air inlet opening which opens from the atm... | 02/05/1980 |
| 4186369 | Connector for terminating the end of a sheathed heating element A connector for terminating the end of a sheathed heating element is formed by an elongated body having a cavity at one end. The cavity includes at least one surface having a diameter dimension adapted to slidingly engage one of the diameter surfaces of t... | 01/29/1980 |
| 4183339 | Electrostatic fuel atomizing apparatus for internal combustion engine A piston slidably received in a tubular housing is movable in response to the instantaneous flow of intake air to vary the number of small diameter tubes through which fuel can be jetted under the influence of a variable electrostatic force induced by the... | 01/15/1980 |
| 4182651 | Pulsed deuterium lithium nuclear reactor A nuclear reactor that burns hydrogen bomb material 6-lithium deuterotritide to helium in successive microexplosions which are ignited electrically and enclosed by this same molten material, and that permits the conversion of the reaction heat into useful... | 01/08/1980 |
| 4182650 | Pulsed nuclear fusion reactor This invention relates to a nuclear fusion power plant for producing useful electrical energy by nuclear combustion of deuterium and lithium to helium. A large concentric plate capacitor is discharged rapidly through a mass of molten LiD1-x T | 01/08/1980 |
| 4181464 | Refuse vehicle loading apparatus A refuse collection vehicle of the type comprising a hopper which is movable between a first position in which refuse may be loaded into the hopper and a second position in which the refuse in the hopper may be transferred to a storage chamber within the ... | 01/01/1980 |
| 4181265 | Material processing apparatus and breaker assembly utilized therein A material processing apparatus in which a housing is provided for receiving the material which is transported along the length of the housing to an outlet for discharge. One or more breaker assemblies are supported by the housing and normally extend in t... | 01/01/1980 |
| 4179894 | Dual source heat pump A dual source heat pump system is disclosed for automatically selecting in either the heating or cooling mode of operation that source which will most efficiently meet the heating or cooling demand required of the system. The heat pump system includes val... | 12/25/1979 |
| 4179250 | Thread construction for rotary worm compression-expansion machines A rotary worm fluid working machine in which a casing enclosed rotor, cooperable with one or more rotary pinions, is provided with a plurality of spiral thread grooves each having convergent side surfaces so that teeth on the pinion wheel enter the thread... | 12/18/1979 |
| 4178812 | Variable speed transmission device A variable speed transmission device of the type in which a first rotatable element is in rolling friction engagement with a second nutatable element having an axis movable in a biconical path about the axis of the first elements. The first element suppor... | 12/18/1979 |
