...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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 |
| 5397759 | Hollow porous microspheres made from dispersed particle compositions Hollow porous microspheres of uniform diameter and of uniform wall thickness are disclosed. The walls of the hollow microspheres comprise sintered together particles which define interconnecting voids within the walls and a single central cavity in the in... | 03/14/1995 |
| 5352366 | Method for purifying liquid fuel boiler smoke by cooling and washing the smoke and neutralizing the effluents To purify smoke from a liquid fuel (in particular heavy fuel oil) boiler by eliminating unwanted components including acids, the smoke, before it is exhausted to the atmosphere, is caused to pass along a vertical path in a heat exchanger adapted to recove... | 10/04/1994 |
| 5283170 | Process for filling tubes for cryogenically preserving biological samples The tube, known as a straw, according to the invention, is conventional in its form, and is constituted by a rectilinear length of transparent tubular envelope. In the vicinity of a first end, the straw contains a sliding stopper with a quantity of powder... | 02/01/1994 |
| 5225123 | Methods for producing hollow microspheres made from dispersed particle compositions Method for making hollow microspheres of substantially uniform diameter and of substantially uniform wall thickness is disclosed. The walls of the hollow microspheres comprise sintered together particles which define interconnecting voids within the walls... | 07/06/1993 |
| 5221348 | High pressure glue injector A glue injector for injecting glue under high pressure is described that comprises a barrel (2), a plunger (3) that is received within the barrel and extends rearwardly through an aperture (19) in the body (4) of a handle which carries a pair of opposed f... | 06/22/1993 |
| 5212143 | Hollow porous microspheres made from dispersed particle compositions Hollow porous microspheres of substantially uniform diameter and of substantially uniform wall thickness are disclosed. The walls of the hollow microspheres comprise sintered together particles which define interconnecting voids within the walls and a sin... | 05/18/1993 |
| 5192272 | Pack for administration of sterile liquids including pharmaceutical, nutrient and energy-source liquids A pack for slow administration to a patient of extremely accurate volumes of sterile, for example pharmaceutical, nutrient or energy-source liquid, comprises in combination at least three systems adapted to be interconnected. The first system is a flowrat... | 03/09/1993 |
| 5190880 | Tube known as straw, for cryogenically preserving biological samples The tube, known as a straw, according to the invention, is conventional in its form, and is constituted by a rectilinear length of transparent tubular envelope. In the vicinity of a first end, the straw contains a sliding stopper with a quantity of powder... | 03/02/1993 |
| 5178024 | Metal bellows type sealed rotary transmission device A sealed transmission device for controlling a valve including a casing containing a transfer member coupled to a control shaft and to a receiver shaft. A bellows surrounds the receiver shaft and is fixed and sealed at its upper end to the transfer member... | 01/12/1993 |
| 5160940 | Ink-jet printing device for straws to contain biological fluids An ink jet printing machine for elongate cylindrical articles such as tubes or straws for biological fluids, includes an automatically controlled ink-jet printing station. The printing station includes a printing head, handling apparatus for the straws or... | 11/03/1992 |
| 5138958 | Process for incinerating domestic refuse in a fluidized bed furnace A process for incinerating domestic refuse is implemented in a boiler comprising a fluidized bed furnace over which is a post-combustion chamber. The smoke passes through alternately upward and downward paths in which it is cooled in contact with walls pr... | 08/18/1992 |
| 5085227 | Conductive cutaneous coating for applying electric currents for therapeutic or beauty treatment A conductive cutaneous coating for application to an area of a person's skin for use in applying electric currents for therepeutic or beauty treatment comprises a gel polymerizable when brought into contact with air of a terniary mixture of polyvinyl alco... | 02/04/1992 |
| 5048540 | Contact unit embeddable in an electrically conductive casting for use in electrical treatment for therapeutical or beauty purposes A contact unit for applying current to a person's skin through an electrically conductive casting composition spread over an area of skin to be treated for therapeutical or beauty purposes. The contact unit electrically interconnects an electric current g... | 09/17/1991 |
| 5024441 | Golfcourse simulator device A golf course simulator comprises a track running between a driving area and a target. The track incorporates a plurality of selectively openable and closable holes. The target marks the boundary between the virtual space in which an objective hole is sit... | 06/18/1991 |
| 4922661 | Water stop for a window A water stop for a window having improved resistance to the ingress of water due to rain or other precipitation regardless of the opening arrangement of the window. The stop consists of a low vertical wall member which extends parallel to and behind the o... | 05/08/1990 |
| 4892010 | Sealed transmission device using metal bellows, suitable for quarterturn valves A sealed rotary transmission device comprises a control shaft and a receiver shaft parallel to and spaced from the control shaft. A bellows surrounds the receiver shaft, and has one end fixed in a sealed way to a casing of the device. The device also incl... | 01/09/1990 |
| 4867931 | Methods for producing fiber reinforced microspheres made from dispersed particle compositions Fiber reinforced hollow microspheres made from dispersed particle film forming compositions including fibers, dispersed particles, a binder, a film stabilizing agent, a dispersing agent and a continuous liquid phase. Porous and non-porous fiber reinforced... | 09/19/1989 |
| 4843847 | Apparatus and method for ultrasonically inspecting articles for internal defects A mechanically amplified electroacoustic transducer system comprising an electroacoustic transducer having a vibrating element and an amplifier rod forming a probe extending from the transducer and in acoustically coupling contact with the vibrating eleme... | 07/04/1989 |
| 4828565 | Cotyloidal component for a non-cemented hip prosthesis A cotyloidal component for a non-cemented hip prosthesis comprises a hemispherical titanium dome member and a cup of polymer material which is engaged therein to form a friction lining and to receive the spherical head of a femoral component. The titanium... | 05/09/1989 |
| 4815917 | Bin sorter for use in a lumber mill A bin sorter divided by vertical or inclined parallel walls into a plurality of bins, each having a bin floor which can be lowered to a lumber discharge station and a series of rotatable gates extending from the bottom of each bin wall and functioning to ... | 03/28/1989 |
| 4793980 | Hollow porous microspheres as substrates and containers for catalyst Hollow porous microspheres are used as substrates and containers for catalyst to make microsphere catalysts. The hollow porous microspheres are made from dispersed particle compositions. The microspheres have a single central cavity, have substantially un... | 12/27/1988 |
| 4785739 | Tracked transportation system comprising emergency car braking system In a tracked transportation system independent cars are drawn along by a common cable. A car comprises a rolling chassis with a cabin suspended above the chassis by a set of chains. The chains are coupled to a shaft forming apparatus for weighing the cabi... | 11/22/1988 |
| 4777154 | Hollow microspheres made from dispersed particle compositions and their production Hollow microspheres are made by a process which comprises forming a film of a dispersed particle film-forming composition (containing dispersed particles, a binder, a film stabilizing agent and a continuous liquid phase) across a coaxial blowing nozzle, a... | 10/11/1988 |
| 4771698 | Sensing system for a tracked vehicle transportation system A sensing system for use on a tracked vehicle transporation system forms a sensitive floor beneath the lip of a platform. The floor is made up of a plurality of metal plates mounted on spring supports so that they can be slightly depressed if an abnormal ... | 09/20/1988 |
| 4766696 | Automatic sliding door operating device for guided vehicle A tracked transportation system uses an automatic car door opening and closing system. The car door or one panel of a two-panel door carries a lever on which is a rear abutment member designed to roll along an outside surface at the bottom of the car. Thi... | 08/30/1988 |
| 4762070 | Transport installation comprising a guide track and circulating cable driven cars A transport installation comprises a guide track and at least one car which moves on the track. A circulating cable is provided near the track and a gripping device on the car grips the cable. Lateral retaining members are fixed to the car and accommodate... | 08/09/1988 |
| 4750824 | Protected rearview mirror assembly A mirror is position-adjustably mounted to an upstanding part from which a protective hood rearwardly extends. A hanging device is provided to hang the hood from the top edge of the side window of a vehicle so as to protect the mirror and the adjacent win... | 06/14/1988 |
| 4743545 | Hollow porous microspheres containing biocatalyst Biocatalyst such as enzymes or cells are immobilized in hollow porous microspheres for use as bioreactors in biochemical processes. The microspheres are of substantially uniform diameter of 200 to 10,000 microns and of substantially uniform wall thickness... | 05/10/1988 |
| 4743261 | Tibial component for unicompartmental knee prosthesis for a cementness implantation A tibial component for a unicompartmental knee prosthesis intended to be fitted without cement, comprises a metal base portion in the general form of a segment of a circular disc with generally flat upper, lower and lateral faces, the latter which is perp... | 05/10/1988 |
| 4718915 | Femoral component of a hip prosthesis The femoral component of a hip prosthesis comprises a shaft, from the upper face of which projects a neck carrying a spherical head intended to seat in a cotyloid component. The shaft, which tapers toward a lower end, is curved to connect the neck to the ... | 01/12/1988 |
| 4718836 | Reciprocating completely sealed fluid-tight vacuum pump A completely dry fluid-tight reciprocating vacuum pump comprises one or more pumping chambers defined between two rigid parts which face one another in the axial direction. One is reciprocated in a straight line relative to the other. They are connected t... | 01/12/1988 |
| 4716838 | Transport installation comprising a guide track and a car provided with gripping means cooperating with a drive cable A transport installation comprises a guide track and at least one car which moves on the track. A circulating cable is provided near the track and a gripping device on the car grips this cable. This device comprises two gripping members movable relative t... | 01/05/1988 |
| 4676992 | Process for the deposition, on optical substrates, of antireflection coatings capable of being engraved A process for the deposition, on an optical substrate, of an antireflection coating capable of being engraved. In the process, metal is evaporated in a reactive atmosphere within the enclosure of an evaporator under vacuum and then deposited on the substr... | 06/30/1987 |
| 4671994 | Method for producing fiber reinforced hollow microspheres Fiber reinforced hollow film forming material microspheres 17 made from a fiber and film forming material composition are described. The fiber reinforced hollow microspheres 17 are used to make shaped and molded articles and to make insulation materials. ... | 06/09/1987 |
| 4671909 | Method for making hollow porous microspheres Hollow microspheres are made by a process which comprises forming a film of a dispersed particle film-forming composition (containing dispersed particles, a binder, a film stabilizing agent and a continuous liquid phase) across a coaxial blowing nozzle, a... | 06/09/1987 |
| 4659250 | Pavement extractor An improved pavement extractor is disclosed herein which comprises a completely self-contained unit for removal of pavement in a situation where a new pavement is to be created. The device includes a combination of rippers and a hold-down pressure plate w... | 04/21/1987 |
| 4643784 | Application and repair method for veneer and the like A method of applying and repairing veneers and the like comprises the following steps: sticking a sheet to the outside surface of the veneer; unsticking the veneer from its support; sticking the sheet to a substantially rigid transparent plate; repairing the veneer... | 02/17/1987 |
| 4637990 | Hollow porous microspheres as substrates and containers for catalysts and method of making same Hollow porous microspheres are used as substrates and containers for catalyst to make microsphere catalysts. The hollow porous microspheres are made from dispersed particle compositions. The microspheres have a single central cavity, have substantially un... | 01/20/1987 |
| 4601506 | Cable coupler for tree skidding cables In a tree skidding arrangement comprising a mainline secured to the winch of a line skidder and having a number of chokers secured to sliders which are freely slidable along the mainline, the last choker is secured to the mainline through a cable coupler.... | 07/22/1986 |
| 4582534 | Metal microspheres, filamented hollow metal microspheres and articles produced therefrom Hollow metal microspheres are made from film forming metal compositions and are used to make superior high strength light weight structures, improved insulating materials and insulating systems, or the microspheres can be used as filler materials in plast... | 04/15/1986 |