Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 4847202 | Heterocyclic inhibitors of serine proteases Certain novel heterocyclic compounds, aromatic thioesters, their preparation, and their use in inhibiting serine proteases with chymotrypsin-like and elastase-like specificity and in the treatment of diseases such as emphysema which involve tissue proteol... | 07/11/1989 |
| 4660038 | Doppler distrometer for the measurement of hydrometer size distribution An apparatus and method are disclosed which employ the Doppler principle to measure the terminal velocity and, hence, the size distribution of hydrometeors such as raindrops and hailstones. The apparatus of the present invention employs a ground-based, up... | 04/21/1987 |
| 4597634 | Stereoscopic process and apparatus A method and apparatus for producing and viewing stereoscopic images through the use of a color coded image whereby the desired depth or distance is based upon the color of the portion of the image being viewed. Therefore the parts of the image which are ... | 07/01/1986 |
| 4585793 | Thioester inhibitors of serine proteases Certain novel heterocyclic compounds, aromatic thioesters, their preparation, and their use in inhibiting serine proteases with chymotrypsin-like and elastase-like specificity and in the treatment of diseases such as emphysema which involve tissue proteol... | 04/29/1986 |
| 4559313 | Removal of inorganic contaminants from catalysts Spent catalysts containing metal impurities are treated by a process comprising treating the spent catalyst with a solution containing oxidizing ferric ion and/or oxidizing bacteria, thereby freeing said spent catalyst of said metal impurities.... | 12/17/1985 |
| 4550198 | Purification of terephthalic acid by supercritical fluid extraction A process for the purification of terephthalic acid comprising (1) contacting an impure terephthalic acid with an amount of supercritical fluid, at a temperature and pressure, and for a period of time, sufficient to dissolve the terephthalic acid and its ... | 10/29/1985 |
| 4546275 | Quarter-square analog four-quadrant multiplier using MOS integrated circuit technology A four-quadrant NMOS transconductance multiplier including plural NMOS transistors formed in a substrate to produce a pair of summer stages and a pair of squaring stages which process a pair of input signals V1, V2 to produce an outp... | 10/08/1985 |
| 4538825 | Wheelchair anti-rollback mechanism The customary side hand propulsion ring adjacent to each main wheel of a manual wheelchair is mounted through a lost motion connection between the propulsion ring and main wheel so that the propulsion ring can have limited rotational movement relative to ... | 09/03/1985 |
| 4537415 | Dynamic brake for manual wheelchair To substantially reduce the physical effort required to slow or stop a manually propelled wheelchair, the customary propulsion ring attached to the outer side of each main chair wheel is mounted on the wheel for limited inward axial movement under manual ... | 08/27/1985 |
| 4529377 | Pulse combustor apparatus A pulse combustor apparatus including a combustor tube having open ends and containing at least one combustion zone where combustion of a fuel occurs and heat is released, resulting in the formation of a standing acoustic mode with nodes and anti-nodes in... | 07/16/1985 |
| 4509052 | RF Interferometer/Doppler target location system A radio frequency interferometer/Doppler target location system comprising in one embodiment a wave source on a target vehicle which is tracked by a radio frequency interferometer located at a known situs. The radio frequency interferometer generates sign... | 04/02/1985 |
| 4497637 | Thermochemical conversion of biomass to syngas via an entrained pyrolysis/gasification process Biomass feedstock raw material is converted to synthesis gas by drying and sizing biomass raw material, pyrolyzing the processed biomass in intimate mixture with inert gases such as combustion products, thereby obtaining a product mixture of char, pyrolys... | 02/05/1985 |
| 4482510 | Self-propelled jet aerator A self-propelled aeration device comprising a jet-aerator mounted on floats and connected by a hinged arm to a central pile for enabling the said aerator to rotate around the pile thus mixing and aerating both the large surface and great depth of a reserv... | 11/13/1984 |
| 4472358 | Packing for fluidized bed reactors Packing for fluidized bed reactors, is improved by providing alternately inclined baffles connected directly to each other or by means for connecting the said baffles into grids located in one or several levels, the said baffles forming expanding and cont... | 09/18/1984 |
| 4464189 | Fractional distillation of C2 /C3 Hydrocarbons at optimum pressures A method of recovering by distillation the separate components of a hydrocarbon gas mixture comprising ethylene, ethane, propylene and propane which comprises separating the ethylene and ethane as an overhead from a propylene and propane bottom in a first... | 08/07/1984 |
| 4462605 | Wheelchair having anti-rollback mechanism The propulsion wheels of a manually propelled wheelchair are equipped with one-way engaging and one-way freewheeling clutch devices which cooperate with races fixed to the wheelchair frame, whereby unwanted backward movement of the wheelchair is prevented... | 07/31/1984 |
| 4430102 | Fractional distillation of C2 /C3 hydrocarbons at optimum pressures A method of recovering by distillation the separate components of a hydrocarbon gas mixture comprising ethylene, ethane, propylene and propane which comprises separating the ethylene as an overhead from an ethane, propylene and propane bottom in a first d... | 02/07/1984 |
| 4428308 | Linear down-draft biomass gasifier A biomass gasification method and apparatus employs a rectangular design and linear injection of feedstock to allow compact modular design to accommodate a wide variety of energy demands with a single-size production unit which can be stacked with others ... | 01/31/1984 |
| 4415591 | Use of aminoalkyl phenyl sulfide derivatives for the treatment of hypertension Hypertension in mammals can be treated by administering an effective amount of an aminoalkyl phenyl sulfide having the formula ##STR1## wherein (Cn H2n)=a linear or branched alkyl chain of 10 carbons or less (n=1-10); R1 | 11/15/1983 |
| 4411676 | Fractional distillation of C2 /C3 hydrocarbons at optimum pressures A method of recovering by distillation the separate components of a hydrocarbon gas mixture comprising ethylene, ethane, propylene and propane which comprises separating the ethylene as an overhead from an ethane, propylene and propane bottom in a first d... | 10/25/1983 |
| 4399000 | Process for producing absolute alcohol by solvent extraction and vacuum distillation Alcohol substantially free of water is produced by a process comprising extracting an aqueous alcohol solution with an organic solvent system containing an extractant for said alcohol thereby forming an organic solvent-alcohol phase and an aqueous phase, ... | 08/16/1983 |
| 4366452 | Multi-position waveguide switch A multi-position waveguide switch including a cylindrical housing supporting radially extending waveguides, a switching assembly composed of a stack of disks each having input and output ports interconnected by waveguide sections, and a mechanism for sele... | 12/28/1982 |
| 4355317 | Dish antenna and method for making A lightweight inexpensive fiberglass antenna dish is disclosed, as well as a method for the manufacture thereof. The dish may be formed by spraying chopped fiberglass and epoxy binder onto the glazed surface of a parabolic mold. An aperture formed on the ... | 10/19/1982 |
| 4350412 | Fresnel spiral reflector and method for making same A spiral Fresnel reflector is formed by plotting a predetermined developed spiral on a flat sheet of reflecting material, cutting the flat sheet of reflecting material along the developed spiral and winding up the developed spiral until the spiral arms fo... | 09/21/1982 |
| 4343765 | Method for deodorizing and disinfecting air In a first embodiment of the method and apparatus, the oxidant is loaded upon a support bed and is continuously regenerated by an ozone generator located upstream from the support bed. The ozone generator has a capacity less than the peak load requirement... | 08/10/1982 |
| 4321799 | Method for utilizing gas-solid dispersions in thermodynamic cycles for power generation and refrigeration Heat is transferred from a first body to a second body and thereby provides power by carrying a thermodynamic fluid comprising a dispersion of a particulate solid in a gas around a thermodynamic cycle or cycles involving the expansion and contraction of t... | 03/30/1982 |
| 4321853 | Automatic ear training apparatus An electronic device for use in aiding the instruction of musical students. The device is comprised of a metronome and a plurality of tone generators, all under the control of a microprocessor computer. Input devices for the system take the form of a musi... | 03/30/1982 |
| 4318581 | Optical holographic content-addressable memory system for truth table look-up processing A numerical optical processor which utilizes a holographic content-addressable memory is disclosed. The holographic memory stores relationships between various inputs and system outputs in the form of a plurality of truth tables in a digital format. One o... | 03/09/1982 |
| 4313911 | Low pressure tritiation of molecules Molecules are tritiated by depositing molecules of a substance to be tritiated on a supporting substrate in a vacuum chamber, and then subjecting the substance to low pressures of tritium gas. In a second embodiment of the invention, a substance is tritia... | 02/02/1982 |
| 4284860 | Time doman measurement of moving coil loudspeaker driver parameters A novel method for the measurement of the Thiele-Small small-signal parameters of a moving-coil electromagnetic transducer driver is disclosed. The technique is based on a time domain analysis of the transient response of a loudspeaker voice coil circuit ... | 08/18/1981 |
| 4278450 | Method for the recovery of clean pyrolysis off-gas and a rotary recycling means therefor A method and apparatus for stripping entrained organic vapor and solid particulate matter from a pyrolytic off-gas stream is disclosed. The off-gas is introduced at the top of a conical chamber having a variable speed "squirrel cage" rotor at its top. The... | 07/14/1981 |
| 4277789 | Microwave energy transmission system for around-the-mast applications A microwave energy transmission system for coupling a stationary waveguide to a rotating waveguide including a transition coupling assembly comprising a plurality of equal length transmission lines having their opposite ends terminating in annular pattern... | 07/07/1981 |
| 4255751 | Feed mechanism for a geodesic lens A feed system for a geodesic Luneberg lens antenna system is disclosed, in which sequential cyclical scanning of a plurality of feed sectors of the lens from one transmitter/receiver is achieved with a minimum of dead time between successive scans.... | 03/10/1981 |
| 4253221 | Method of producing low voltage field emission cathode structure A method of making a low voltage field device utilizing a preferentially etched unidirectionally solidified composite as the substrate. In the process, the composite is etched so that the electrically conducting rod-like or fiber phase protrudes above the... | 03/03/1981 |
| 4249258 | Self-calibrating voltage standing-wave ratio meter system A circuit for use in connection with a meter for measuring the voltage standing-wave ratio (VSWR) along a transmission line wherein forward and reflected voltages in the transmission line are coupled off and detected by two respective diodes. Calibration ... | 02/03/1981 |
| 4242186 | Low pressure tritiation of molecules Molecules are tritiated by depositing molecules of a substance to be tritiated on a supporting substrate in a vacuum chamber, and then subjecting the substance to low pressures of tritium gas. In a second embodiment of the invention, a substance is tritia... | 12/30/1980 |
| 4240768 | Transport system with blocking valve control A pump which generates pressurized air flow in a pipeline to sweep wheeled vehicles along with the air flow is provided with a flow control mechanism. First and second blocking valves which normally prevent reverse flow of air in the pipeline but which ca... | 12/23/1980 |
| 4231689 | Air-actuated pipeline transportation system with wheeled vehicles A pipeline transportation system for wheeled vehicles which are moved therethrough by air. The vehicle functions as a pipeline sweeper to remove debris from the pipeline through one or more openings provided in the bottom of the pipeline. In one embodimen... | 11/04/1980 |
| 4165845 | Method and apparatus for processing vehicles moving through a conduit by air A method and apparatus for processing vehicles which are moved through a conduit by air through sequential zones one, two and three. Preferably, the zones are inclined downwardly towards downstream for aiding movement of the vehicles downstream by gravity... | 08/28/1979 |
| 4153978 | Method for fiber alignment using fluid-dynamic forces A method and apparatus are provided for aligning individual fibers parallel to the main fluid stream that is conveying them, using fluid-dynamic forces. This method and apparatus are based on the use of converging streamlines in a nearly irrotational flow... | 05/15/1979 |