Patents by Inventor Sung K. Cho
Sung K. Cho has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7624474Abstract: A portable extractor apparatus is shown which includes a wheel mounted base having a solution tank for dispensing and recovering cleaning solution. A cleaning head communicates with the solution tank and contacts the surface to the cleaned for dispensing and recovering cleaning solution. A fluid pump circulates cleaning solution in a path between the solution tank and the cleaning head. A vacuum motor provides a vacuum source for the cleaning head for suctioning the surface being cleaned. The solution tank has mounted thereon both an initial multi-component filter assembly which initially filters incoming solution being circulated to the solution tank and a distinct final filter component which removes smaller particles from the solution being re-circulated from the tank. The solution tank bottom wall has a profile which improves the efficiency of the final filter component.Type: GrantFiled: November 14, 2008Date of Patent: December 1, 2009Assignee: Tacony CorporationInventor: Sung K. Cho
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Patent number: 6055699Abstract: An adapter plate, removably mounted with respect to the cleaning tool head of a continuous flow recycling cleaning device, supports a fluid flow barrier. The barrier is formed of multiple resilient filaments parallel to one another and packed closely together to resist air passage through the barrier. The filaments are supported in cantilevered fashion, and are individually and locally deformable as the tool head is placed in an operating position near a floor or other surface to be cleaned. The barrier thus conforms to the topography of the surface being cleaned, to achieve a better seal. The barrier is used in combination with a more porous layer, e.g., a carpet tile or a less tightly packed filament arrangement, to channel air from outside of the tool head into an intake compartment while blocking passage to an exhaust compartment inside the tool head.Type: GrantFiled: October 16, 1997Date of Patent: May 2, 2000Assignee: CFR CorporationInventor: Sung K. Cho
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Patent number: 5839155Abstract: A continuous flow recycling cleaning system includes a canister containing a liquid cleaning solution, and a dispensing conduit for conveying the cleaning solution from the canister to a cleaning tool head for direct application to a carpet, upholstery fabric or other material at an application area. A recovery conduit is connected to the cleaning tool head for returning recovered cleaning solution, along with air and extracted soil, to the canister. The system includes at least one ozone injector selectively positioned along a fluid flow pathway that includes the canister, the dispensing and recovery conduits, and the cleaning tool head. The fluid flow pathway further can include a counterflow conduit and an ozone-introduction conduit provided solely for the injection of ozone. Each injector is coupled to an ozone generator, to combine the ozone with the cleaning solution flowing through the injector.Type: GrantFiled: June 6, 1996Date of Patent: November 24, 1998Assignee: CFR CorporationInventors: Edward D. Berglund, Sung K. Cho, Lowell H. Schiebe
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Patent number: 5602594Abstract: An apparatus for controlling a buffer adapted to transmit motion-involving video compressed by use of an intraframe compression coding technique employing discrete cosine transform and variable length coding to a constant rate channel, wherein a statistical feed-forward-based buffer control apparatus having a simple construction is combined with an existing statistical feed-back-based buffer control apparatus, thereby being capable of stably controlling a buffer even when a scene change occurs, and reducing the capacity of the buffer and the length of a tape needed.Type: GrantFiled: August 12, 1994Date of Patent: February 11, 1997Assignee: Goldstar Co., Ltd.Inventors: Sung K. Cho, Yong H. Lee, Joon P. Chang, Choon Lee
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Patent number: 5589080Abstract: A liquid recycling and filtering system is well suited for use in continuous flow recycling surface cleaning devices. The system employs a canister containing a liquid cleaning solution, and a cylindrical filter submerged in the liquid and defining a chamber containing a portion of the liquid. A liquid supply conduit withdraws liquid from the chamber and supplies the liquid to a cleaning tool head, where the liquid is sprayed upon a floor or other surface being cleaned. A counterflow conduit is coupled to the liquid supply conduit and to the chamber, for transporting liquid under pressure to a spraying assembly within the chamber. The spraying assembly includes a rotatable manifold and nozzles at opposite ends of the manifold. The nozzles spray the liquid in planar, fan-shaped patterns that impinge upon the filter over limited surface areas.Type: GrantFiled: April 4, 1995Date of Patent: December 31, 1996Assignee: CFR CorporationInventors: Sung K. Cho, Lowell H. Schiebe
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Patent number: 5555598Abstract: A continuous flow recycling surface cleaning device includes a cleaning tool head incorporating a nozzle arrangement to enhance surface cleaning and drying. The head includes a shell that engages a surface being cleaned to form an enclosed chamber. A partition divides the chamber into intake and evacuation compartments. A row of nozzles is mounted to the shell to spray liquid cleaning solution into the intake compartment. Air enters the receiving sector through slots near the nozzles and between a forward portion of the shell and the floor, and is drawn beyond the partition into the evacuation compartment by a vacuum source. Each of the nozzles generates a sheet-like, fan-shaped spray pattern. The nozzles are arranged to form adjacent spray patterns that overlap one another longitudinally (lengthwise of the elongate shell) but are separated from one another to avoid interference between adjacent spray patterns.Type: GrantFiled: April 4, 1995Date of Patent: September 17, 1996Assignee: CFR CorporationInventors: Dale L. Grave, Sung K. Cho
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Patent number: 5495451Abstract: An apparatus for detecting data input/output states of a plurality of FIFO memories, comprising a control signal generator for logically combining a load clock signal, a read clock signal, a write clock signal and a reset signal to generate a clock signal and a mode signal, a clock counting circuit for performing a counting operation for the read clock signal and the write clock signal in response to the clock signal and the mode signal from the control signal generator to generate a count signal, a fullness level value storage unit for storing a plurality of fullness level values, a multiplexer for selecting one of the fullness level values from the fullness level value storage unit in response to a select signal, a signal comparator for comparing an output signal from the multiplexer with the count signal from the clock counting circuit to discriminate whether it is the same as the count signal, a demultiplexer for generating a plurality of status signals in response to an output signal from the signal compType: GrantFiled: January 3, 1995Date of Patent: February 27, 1996Assignee: Goldstar Electron Co., Ltd.Inventor: Sung K. Cho
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Patent number: 5281589Abstract: Novel semi-synthetic cephalosporin derivatives having a fused pyridiniummethyl at 3-position of the cephem nucleus, pharmaceutically acceptable salts, physiologically hydrolizable esters or solvates thereof are disclosed. Also disclosed is a process for preparing the cephalosporin derivatives which comprises introducing a fused pyridiniummethyl substituent at 3-position of 7-.beta.-[(Z)-2-(2-aminothiazol-4-yl)-2-methoxyiminoacetamido]-3-cephem-ca rboxylic acid derivatives. The compounds of the present invention show potent antibacterial activities and a broad spectrum against both gram-positive and gram-negative bacteria.Type: GrantFiled: June 10, 1992Date of Patent: January 25, 1994Assignee: Cheil Foods & Chemicals, Inc.Inventors: Choong S. Kim, Seung H. An, Sung K. Cho, Yang S. Ahn, Kyoung E. Choi, Je H. Kim, Rok L. Yun, Sung Y. Park, Yeo H. Yoon, Chun S. Lyu, Koun H. Lee