Patents by Inventor Hiromi Yamashita

Hiromi Yamashita 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).

  • Publication number: 20060086612
    Abstract: The troublesomeness during the setting of a plurality of capillaries is eliminated by composing pairs of electrodes, which are electrically connected to the common electrode, and capillaries. By bringing electrodes installed in the vicinity of each capillary disposed at the pitch of wells on the side of sample plate (within the area of the wells) into electrical contact with a common electrode, the capillaries and electrodes are made integral in construction. When a voltage is applied to the electrophoretic instrument via a common electrode portion, the voltage is applied to the electrodes for each capillary. This enables an inexpensive microtiter plate, etc. to be used and a multiple of capillaries to be simultaneously inserted, attached and detached.
    Type: Application
    Filed: December 8, 2005
    Publication date: April 27, 2006
    Inventors: Muneo Maeshima, Kazumichi Imai, Masaya Kojima, Satoshi Takahashi, Hiromi Yamashita
  • Publication number: 20060086613
    Abstract: A sample plate assembly for an electrophoresis apparatus including a tray at a sample supply portion of a capillary array, an adapter for the tray, a sample plate mounted on the adapter, a septer mounted on the sample plate and a septer holder mounted on the septer. Thereby, many number of samples can be automatically supplied to capillaries in a multi capillary array.
    Type: Application
    Filed: December 14, 2005
    Publication date: April 27, 2006
    Inventors: Shuhei Yamamoto, Hiromi Yamashita, Masatoshi Kitagawa
  • Patent number: 7014746
    Abstract: The troublesomeness during the setting of a plurality of capillaries is eliminated by composing pairs of electrodes, which are electrically connected to the common electrode, and capillaries. By bringing electrodes installed in the vicinity of each capillary disposed at the pitch of wells on the side of sample plate (within the area of the wells) into electrical contact with a common electrode, the capillaries and electrodes are made integral in construction. When a voltage is applied to the electrophoretic instrument via a common electrode portion, the voltage is applied to the electrodes for each capillary. This enables an inexpensive microtiter plate, etc. to be used and a multiple of capillaries to be simultaneously inserted, attached and detached.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: March 21, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Muneo Maeshima, Kazumichi Imai, Masaya Kojima, Satoshi Takahashi, Hiromi Yamashita
  • Publication number: 20040173460
    Abstract: A capillary array electrophoretic device capable of securing a sample plate array and a buffer container three dimensionally on a tray of an autosampler. A tray (700) is provided with a guide groove (701) and a stopper (702) corresponding to guides (715, 716) of sample plate assemblies (710, 711) including a microtiter plate.
    Type: Application
    Filed: April 27, 2004
    Publication date: September 9, 2004
    Inventors: Shuhei Yamamoto, Hiromi Yamashita
  • Publication number: 20030178311
    Abstract: The troublesomeness during the setting of a plurality of capillaries is eliminated by composing pairs of electrodes, which are electrically connected to the common electrode, and capillaries.
    Type: Application
    Filed: April 15, 2003
    Publication date: September 25, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Muneo Maeshima, Kazumichi Imai, Masaya Kojima, Satoshi Takahashi, Hiromi Yamashita
  • Patent number: 6572752
    Abstract: The troublesomeness during the setting of a plurality of capillaries is eliminated by composing pairs of electrodes, which are electrically connected to the common electrode, and capillaries. By bringing electrodes installed in the vicinity of each capillary disposed at the pitch of wells on the side of sample plate (within the area of the wells) into electrical contact with a common electrode, the capillaries and electrodes are made integral in construction. When a voltage is applied to the electrophoretic instrument via a common electrode portion, the voltage is applied to the electrodes for each capillary. This enables an inexpensive microtiter plate, etc. to be used and a multiple of capillaries to be simultaneously inserted, attached and detached.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: June 3, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Muneo Maeshima, Kazumichi Imai, Masaya Kojima, Satoshi Takahashi, Hiromi Yamashita
  • Patent number: 6522359
    Abstract: An image signal processing apparatus of the present invention comprises an image sensor for outputting an image data, a sample hold circuit for holding an image data output, a sample hold circuit outputs an analog signal, AD converter for converting the analog signal to a digital signal, a system clock generator for generating a first clock &phgr; 1, a timing generator for controlling hold timing of sample hold circuit according to the first clock &phgr; 1, a second system clock generator for generating a second system clock &phgr; 2 having different phase from the phase of the first system clock &phgr; 1 and AD conversion clock generator for controlling conversion timing of AD converter according to the second clock &phgr; 2. Since two different clocks are used, hold timing does not overlap with a conversion timing. Therefore, the reading of the image data becomes stable and misreading can be reduced and also quality of an image is improved.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: February 18, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Hiromi Yamashita
  • Publication number: 20010040096
    Abstract: A sample plate assembly for an electrophoresis apparatus including a tray at a sample supply portion of a capillary array, an adapter for the tray, a sample plate mounted on the adapter, a septer mounted on the sample plate and a septer holder mounted on the septer. Thereby, many number of samples can be automatically supplied to capillaries in a multi capillary array.
    Type: Application
    Filed: April 27, 2001
    Publication date: November 15, 2001
    Inventors: Shuhei Yamamoto, Hiromi Yamashita, Masatoshi Kitagawa
  • Patent number: 6077492
    Abstract: A titanium oxide photocatalyst having metal ions of one or more metals incorporated therein selected from the group consisting of Cr, V, Cu, Fe, Mg, Ag, Pd, Ni, Mn and Pt, wherein the metal ions are implanted from the surface to deep inside of the bulk of the photocatalyst in an amount of at least 1.times.10.sup.15 ions per g of the titanium oxide; a process for producing the photocatalyst; and a photocatalytic reaction method using the photocatalyst.
    Type: Grant
    Filed: August 21, 1997
    Date of Patent: June 20, 2000
    Assignee: Petroleum Energy Center
    Inventors: Masakazu Anpo, Hiromi Yamashita, Sakunobu Kanai, Kazuhito Sato, Takanori Fujimoto
  • Patent number: 6020958
    Abstract: An atomic absorption spectrophotometer possessing an electrical heating unit which includes a graphite tube for atomizing a sample by heating the sample; a light emitting unit for emitting measuring light and irradiating the atomized sample with the measuring light; a spectroscope unit for diffracting the measuring light passing the electrical heating unit and selecting the required wavelength component; a detection unit for detecting the quantity of the required wavelength component selected by the spectroscope unit; an input unit to input at least one of the wavelengths of the required wavelength component and the required heating temperature of the electrical heating unit; and a control unit for controlling the above units, which comprises a shading device provided at the propagation axis of the measuring light between the electrical heating unit and the detection unit, and which possesses a light transmitting unit, for restricting the quantity of the measuring light passing the electrical heating unit, wi
    Type: Grant
    Filed: January 28, 1999
    Date of Patent: February 1, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Hayato Tobe, Kazuo Moriya, Hiromi Yamashita, Yasushi Terui
  • Patent number: 5978082
    Abstract: The object of this invention is to provide an atomic absorptiometer and a metal specimen atomic vapor generation apparatus used in the atomic absorptiometer, which enable a light absorption measurement based on the Zeeman effect highly capable of background correction and eliminate the need for the troublesome work of dismounting a magnet. For this purpose, the following configuration is employed. First, the specimen, hydrochloric acid, and sodium borohydride are delivered and mixed by the peristaltic pump 10 to produce a metallic hydride. The generated gas-liquid mixture solution is separated by the separator 12 into a specimen gas and liquids. The separated specimen gas is introduced into the heating section 30. Electricity is supplied from the power source 28 to the specimen heating section 30 where the specimen gas introduced is heated and separated into hydrogen and a specimen metal vapor to be measured.
    Type: Grant
    Filed: January 27, 1998
    Date of Patent: November 2, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Yasushi Terui, Kazuo Moriya, Hiromi Yamashita, Hayato Tobe
  • Patent number: 5357351
    Abstract: An image reading device is movable at a predetermined speed relative to a document in a lengthwise direction of the document so as to read a document image and includes a plurality of image sensors arranged in line in a widthwise direction of the document, each image sensor including an array of first to n-th photoelectric conversion elements arranged at the same interval in line, and scan means for causing the array of photoelectric conversion elements of the respective image sensors to scan in the order of first to n-th at a predetermined period. The array of photoelectric conversion elements of the respective image sensors is arranged in such a way that the first photoelectric conversion element slips relative to the n-th photoelectric conversion element a predetermined distance in the direction opposite to the relative movement direction of the image sensor, the predetermined distance being defined by the predetermined relative movement speed and the predetermined period.
    Type: Grant
    Filed: February 17, 1993
    Date of Patent: October 18, 1994
    Assignees: Mita Industrial Co., Ltd., Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshihiro Nakajima, Akihiro Takada, Hiromi Yamashita, Noriyuki Tomita
  • Patent number: 5308977
    Abstract: A plasma mass spectrometer generates an aerosol of a sample, by dissolving the sample in a liquid solvent, and spraying the liquid into a spray chamber via a nebulizer. The solvent condenses in the spray chamber and an aerosol of the sample then passes through a supply tube to a plasma torch. Microwave power from an output on the plasma torch converts the aerosol to a plasma, and the plasma passes to an analyzer. If microwave radiation reached the spray chamber, it would cause heating of the solvent which may evaporate it so that the solvent would be present in the plasma. Therefore, there is a wall between the spray chamber and the plasma torch and microwave output which blocks such microwave radiation.
    Type: Grant
    Filed: March 2, 1993
    Date of Patent: May 3, 1994
    Assignee: Hitachi, Ltd
    Inventors: Konosuke Oishi, Masataka Koga, Hiromi Yamashita, Takashi Iino, Toyoharu Okumoto, Tsuyoshi Nishitarumizu
  • Patent number: 5268765
    Abstract: An image sensor and image sensor chip therefor which generates a reference level for the dark output during the blanking period of the sensor and which provides internal switching for removing residual charge from a waveform shaping capacitor. In one embodiment, image sensor chips are arranged in a line and cascaded to form an image sensor and a dummy photocell is provided which is configured similarly to the image sensor photocells and which has its windows shielded from light. A dummy select switch selectively makes connections with a signal line to which the signals from the image sensor photocells are outputted. The dummy select switch remains closed after completion of the drive period of the photocells at the last image sensor chip and the output of the dummy photocell is used as the reference level for the dark output during the blanking period. In another aspect of the invention, a switch is provided within the chip to remove residual charge from the waveform shaping capacitor.
    Type: Grant
    Filed: April 15, 1992
    Date of Patent: December 7, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Hiromi Yamashita
  • Patent number: 5252827
    Abstract: In the analysis of a specimen gas for at least one impurity, the specimen is fed to a microwave-induced plasma and the plasma is analyzed for the impurity. The plasma is formed by gases fed to it via an inner tube and an outer tube around said inner tube. The specimen is fed in undiluted form via the inner tube and a second gas which may be a standard gas is fed via the outer tube. The specimen gas and the second gas have compositions which are the same as to at least 75% by volume, e.g. are both air. A variety of analysis processes is made available.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: October 12, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Masataka Koga, Toyoharu Okumoto, Hiromi Yamashita, Katuo Kawachi, Yukio Okamoto
  • Patent number: 5182445
    Abstract: A contact type image sensor provided with a case wherein a read space subject to damage by dust and a light source space less damaged by dust are completely separated from each other, and the light source space is formed with a reflecting mirror surface for effectively guiding light from the light source to an original read surface, whereby a uniform read image is obtained by the enhancement of original read performance without occurrence of deterioration in the quality of the image caused by dust.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: January 26, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Hiromi Yamashita
  • Patent number: 5130537
    Abstract: A plasma analyzer for trace element analysis has a gas supply system comprising a plurality of gas sources, an electromagnetic valve provided on a line connecting each gas source to a plasma generating space, a buffer tank provided after the electromagnetic valve on the line, and a flow regulating flowmeter provided after the buffer tank on the line. Each electromagnetic valves is controlled for on-off operation and the corresponding buffer tank suppresses the sudden change of the flow rate of the corresponding gas, so that the composition of the gas supplied to the plasma generating space changes gradually in spite of the simple on-off operation of the electromagnetic valves. Thus, the fluctuation and extinction of the plasma attributable to the sudden change of the composition of the gas supplied to the plasma generating space can be effectively prevented.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: July 14, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Yukio Okamoto, Takashi Iino, Satoshi Shimura, Masamichi Tsukada, Hiromi Yamashita, Masatoshi Kitagawa
  • Patent number: 4983653
    Abstract: Disclosed herein is a polyester shrinkable film. The film according to the present invention can provide extremely excellent durability and long-time storability of contents of a container in labelling and shrink packaging use.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: January 8, 1991
    Assignee: Diafoil Company, Ltd.
    Inventors: Yujiro Fukuda, Hiromi Yamashita
  • Patent number: 4782202
    Abstract: A method and an apparatus for adjusting the resistance value of a thermal head assembly. One voltage pulse or a set of voltage pulses of a preselected peak value are impressed on the heat generating resistor elements of the thermal head assembly. The resistance values of the resistor elements are then measured and compared with the predetermined target value. If the measured resistance values are above the target value, the resistor elements are subjected to another pulse or set of pulses having a peak value a little higher than the preceding one. Then, the resistance values are again measured and compared with the target value. Thus, the resistance values are decreased by successively impressing voltage pulses with the peak value thereof being increased little by little, until the resistance values become lower than the target value.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: November 1, 1988
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tetsunori Sawae, Hiromi Yamashita, Takafumi Endo, Kohei Katayama, Yukio Murata
  • Patent number: D394613
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: May 26, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Seiji Kamimura, Mitsuru Oonuma, Hayato Tobe, Hiromi Yamashita, Hisashi Kimoto