Patents by Inventor Masakazu Fukuda
Masakazu Fukuda 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: 7395172Abstract: An analyzer that comprises a sample measuring mechanism for measuring a sample and generating a measurement value, a memory for storing a plurality of standard values for evaluation of the measurement value, the plurality of standard values including a fixed standard value and a variable standard value, a controller for evaluating the measurement value based on the standard values; and an output device for outputting result of the evaluation of the measurement value by the evaluation means is disclosed. A computer program product is also disclosed.Type: GrantFiled: January 26, 2007Date of Patent: July 1, 2008Assignee: Sysmex CorporationInventors: Hiromi Onomichi, Masakazu Fukuda
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Publication number: 20080102443Abstract: The present invention is to present a column cartridge that enables the obtainment of a plurality of analysis objects from a single sample easily. The column cartridge comprises: a first liquid sample receiving part having an opening for receiving a liquid sample; a carrier for isolating a target substance from the liquid sample; a carrier holding part for holding the carrier; and a flow path part comprising a flow path through which the liquid sample is able to pass after passing through the carrier held by the carrier holding part, and being configured to be fitted into an opening of a second liquid sample receiving part of another column cartridge.Type: ApplicationFiled: October 31, 2007Publication date: May 1, 2008Applicant: SYSMEX CORPORATIONInventors: Masakazu FUKUDA, Hiroaki TOBIMATSU
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Patent number: 7256720Abstract: The invention intends to reduce noises by resistors in an output filter for a delta sigma modulator. The output filter uses an FIR filter with constant current sources as the current source, extracts output data of the delta sigma modulator from each taps of a shift register, controls MOS transistors by the extracted delayed signals, attains currents weighted according to the FIR filter coefficients corresponding to the number of the taps from the constant current sources, adds the currents attained, and performs the current-to-voltage conversion of the currents thus attained by feedback resistors of a full differential operational amplifier.Type: GrantFiled: December 10, 2003Date of Patent: August 14, 2007Assignee: Rohm Co., Ltd.Inventor: Masakazu Fukuda
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Publication number: 20070124099Abstract: An analyzer that comprises a sample measuring mechanism for measuring a sample and generating a measurement value, a memory for storing a plurality of standard values for evaluation of the measurement value, the plurality of standard values including a fixed standard value and a variable standard value, a controller for evaluating the measurement value based on the standard values; and an output device for outputting result of the evaluation of the measurement value by the evaluation means is disclosed. A computer program product is also disclosed.Type: ApplicationFiled: January 26, 2007Publication date: May 31, 2007Applicant: SYSMEX CORPORATIONInventors: Hiromi Onomichi, Masakazu Fukuda
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Publication number: 20070072301Abstract: A system for checking measurement results is provided with a urine qualitative analyzer for measuring the specific gravity of a urine, urinary particle analyzer for measuring urine conductivity, and a computer. The urine specific gravity measured by the urine qualitative analyzer, and the urine conductivity measured by the urinary particle analyzer are respectively transmitted to the computer. The correlative relationship between urine specific gravity and urine conductivity is stored in the memory of the computer, and the computer determines whether or not the received urine specific gravity and conductivity match the correlative relationship, and this determination result is output.Type: ApplicationFiled: September 29, 2005Publication date: March 29, 2007Inventors: Masakazu Fukuda, Yutaka Ikeda, Hiromi Onomichi
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Patent number: 7174266Abstract: An analyzer that comprises a sample measuring mechanism for measuring a sample and generating a measurement value, a memory for storing a plurality of standard values for evaluation of the measurement value, the plurality of standard values including a fixed standard value and a variable standard value, a controlller for evaluating the measurement value based on the standard values; and an output device for outputting result of the evaluation of the measurement value by the evaluation means is disclosed. A computer program product is also disclosed.Type: GrantFiled: August 30, 2005Date of Patent: February 6, 2007Assignee: Sysmex CorporationInventors: Hiromi Onomichi, Masakazu Fukuda
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Publication number: 20060073606Abstract: A urine analysis system includes a urinary particle analyzer and a computer. The urinary particle analyzer has a measuring unit that measures a cast concentration from the urine and an electric conductivity sensor that measures the electric conductivity of the urine. The computer has a function of correcting the cast concentration measured by the measuring unit on the basis of the electric conductivity of the urine measured by the electric conductivity sensor and a function of outputting the corrected cast concentration.Type: ApplicationFiled: September 28, 2005Publication date: April 6, 2006Inventor: Masakazu Fukuda
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Publication number: 20060064270Abstract: An analyzer that comprises a sample measuring mechanism for measuring a sample and generating a measurement value, a memory for storing a plurality of standard values for evaluation of the measurement value, the plurality of standard values including a fixed standard value and a variable standard value, a controlller for evaluating the measurement value based on the standard values; and an output device for outputting result of the evaluation of the measurement value by the evaluation means is disclosed. A computer program product is also disclosed.Type: ApplicationFiled: August 30, 2005Publication date: March 23, 2006Inventors: Hiromi Onomichi, Masakazu Fukuda
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Publication number: 20040233085Abstract: The invention intends to reduce noises by resistors in an output filter for a delta sigma modulator. The output filter uses an FIR filter with constant current sources as the current source, extracts output data of the delta sigma modulator from each taps of a shift register, controls MOS transistors by the extracted delayed signals, attains currents weighted according to the FIR filter coefficients corresponding to the number of the taps from the constant current sources, adds the currents attained, and performs the current-to-voltage conversion of the currents thus attained by feedback resistors of a full differential operational amplifier.Type: ApplicationFiled: December 10, 2003Publication date: November 25, 2004Applicant: ROHM CO., LTD.Inventor: Masakazu Fukuda
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Patent number: 6750060Abstract: A sheath liquid for use with a particle analyzer has a refractive index of 1.3340 or more at the wavelength of sodium D line at 25° C.Type: GrantFiled: March 25, 2003Date of Patent: June 15, 2004Assignee: Sysmex CorporationInventors: Masatsugu Ozasa, Junya Inoue, Masakazu Fukuda
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Publication number: 20030180955Abstract: A sheath liquid for use with a particle analyzer has a refractive index of 1.3340 or more at the wavelength of sodium D line at 25° C.Type: ApplicationFiled: March 25, 2003Publication date: September 25, 2003Inventors: Masatsugu Ozasa, Junya Inoue, Masakazu Fukuda
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Patent number: 6183697Abstract: A particle measuring apparatus surrounds a sample with a sheath liquid to hydrodynamically converge and flow them, and optically measures a particle in the sample to obtain a signal data of the particle. The apparatus provides a monitoring section for comparing a pulse width of the signal data as obtained, with a predetermined standard value to obtain a comparison value and monitoring a flow rate of the sheath liquid based on the comparison value.Type: GrantFiled: May 27, 1998Date of Patent: February 6, 2001Assignee: Sysmex CorporationInventors: Yousuke Tanaka, Masakazu Fukuda, Junzo Yamamoto
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Patent number: 6165740Abstract: To reduce the effects of the contaminants in the measurement of microorganisms and the reduction of the time necessary for the measurement. Measurement is performed of the microorganism prior to and following culture, and the difference between the two is found. This prevents errors caused by the effect of contaminants contained in the specimens. Since the measurement of the microorganism is performed by means of a flow cytometer, the microorganisms can be measured even when the culture period is short. Moreover, the measurements are accurate, since the contaminants are not measured. Furthermore, the growth form of the microorganisms can be determined by measuring the changes in the intensity of the light emission over the duration of emission of the forward scattered light detected by means of a flow cytometer.Type: GrantFiled: September 29, 1999Date of Patent: December 26, 2000Assignee: Sysmex CorporationInventors: Masakazu Fukuda, Junya Inoue, Akito Terai, Kazuyuki Kanai, Kurayoshi Iseki, Mayumi Kamo
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Patent number: 6118522Abstract: An apparatus for differentiating erythrocytes in urine includes: a sheath flow cell for forming a urine specimen flow by surrounding a urine specimen with a sheath liquid, the urine specimen containing particles; a light application device for applying light to the urine specimen flow; a light detector for detecting a light signal emitted by each particle in the urine specimen flow; an identification device for identifying erythrocytes from the particles in the urine specimen flow in accordance with the detected light signal; a particle size distribution preparing device for preparing a particle size distribution diagram of the identified erythrocytes; a determining device for determining an origin of the erythrocytes in accordance with an erythrocyte size value at which an accumulated frequency of erythrocytes as counted from a smallest size in the particle size distribution diagram agrees with a preset value larger than half of a total accumulated frequency in the particle size distribution diagram; and anType: GrantFiled: April 8, 1999Date of Patent: September 12, 2000Assignee: Sysmex CorporationInventors: Kazuyuki Kanai, Masakazu Fukuda
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Patent number: 5888823Abstract: A standard fluid for a flow cytometer which shows, after staining, almost the same fluorescence intensity and scattered light intensity as those of the cells to be assayed.Type: GrantFiled: November 13, 1996Date of Patent: March 30, 1999Assignee: Toa Medical Electronics Co., Ltd.Inventors: Teruya Matsumoto, Masakazu Fukuda
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Patent number: 5757475Abstract: An analyzer for analyzing urine material components is provided, which comprises: a sheath flow cell for forming a sample stream by surrounding a sample liquid containing preliminarily stained particles of the urine material components with a sheath fluid; a light source for illuminating the sample stream; a photodetecter section for detecting optical information from the illuminated material component particles; and an analyzing section for analyzing the material components on the basis of the detected optical information; the analyzing section including a parameter extracting section for extracting a fluorescent light emission duration Flw and a scatter light emission duration Fscw as parameters from the detected optical information, a distribution diagram generating section for generating an Fscw-Flw scattergram, and a judging section for judging whether or not a material component particle being analyzed is a cast, on the basis of location of a data point of the material component particle in the generateType: GrantFiled: December 17, 1996Date of Patent: May 26, 1998Assignee: Toa Medical Electronics Co., Ltd.Inventors: Masayuki Katayama, Masakazu Fukuda, Hiroyuki Seshimo
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Patent number: 5719666Abstract: A particle analyzer includes a flow cell including first and second cells for containing an electrolyte with various types of biological particles floating therein. The first and second cells are connected to each other by a pore to allow the particles to flow from the first cell to the second cell through the pore. A first and a second electrode are provided in the electrolyte in the first and second cells respectively. A first detector detects an electric resistance between the first and second electrodes which changes according as the particle passes through the pore to generate an electric resistance signal representative of the electric resistance. A light source emits a beam of light to the flowing particle and a second detector detects scattered light from the particle receiving the beam of light to generate a scattered light signal representative of an intensity of the scattered light. A clock device clocks a period of time during which the scattered light signal is generated.Type: GrantFiled: November 14, 1995Date of Patent: February 17, 1998Assignee: Toa Medical Electronics Co., Ltd.Inventors: Masakazu Fukuda, Hiroyuki Nakamoto, Masaaki Oka
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Patent number: 5695721Abstract: A specimen stirring device has a stirring impeller on a rotating shaft enclosed in a pipe having one or more side holes in a central portion thereof and a nozzle portion at its end and by rotation of the stirring impeller can create a circulating flow of specimen liquid flowing out of the pipe through the nozzle portion, upward along the outside of the pipe and back into the pipe through the side holes and thereby efficiently stir a specimen liquid in a specimen container even if the specimen container is long and slender or has a tapered bottom and without there being a possibility of the stirring impeller and the specimen container making contact with and damaging each other. A specimen sampling apparatus including this specimen stirring device is also disclosed.Type: GrantFiled: October 27, 1995Date of Patent: December 9, 1997Assignee: Toa Medical Electronics Co., Ltd.Inventors: Nobuhiro Kitagawa, Masakazu Fukuda
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Patent number: 5260764Abstract: An optical particle analyzing apparatus includes a flow cytometer in which laser light and lamp light having a wavelength shorter than that of the laser light are used simultaneously when particles in a blood specimen or the like are analyzed by the flow cytometer. Scattered light emitted by a particle due to irradiation with the laser light and fluorescence emitted by the particle due to irradiation with the lamp light are detected. A signal indicative of the scattered light is used as a timing signal to detect the fluorescence. This arrangement makes it possible to reduce the size and cost of the apparatus.Type: GrantFiled: May 29, 1990Date of Patent: November 9, 1993Assignee: Toa Medical Electronics Co., Ltd.Inventors: Masakazu Fukuda, Hiroyuki Nakamoto, Hiroyuki Seshimo, Hidemichi Tohori
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Patent number: 5173740Abstract: A flow cell for a fluid particle analyzer comprises a narrow measuring liquid path, liquid introducing paths continuous to this measuring liquid path, liquid specimen nozzles disposed so that the front ends may be opposite to each other across the measuring liquid path, and sheath liquid inlets and waste liquid outlets disposed in the liquid introducing paths, respectively.The particle analyzer is designed to emit light to the liquid specimen flowing as a sheath flow in the measuring liquid path in the flow cell and detect the light from the particles individually. Since two liquid specimen nozzles are disposed opposite to each other, measurements from the liquid specimen discharging from one of the liquid specimen nozzles can take place while preparation of the other liquid specimen takes place, so that the analysis processing time can be notably shortened.Type: GrantFiled: July 22, 1991Date of Patent: December 22, 1992Assignee: Toa Medical Electronics Co., Ltd.Inventors: Masakazu Fukuda, Hiroyuki Nakamoto, Hidemichi Tohori