Patents by Inventor Kenichi Kokubo

Kenichi Kokubo 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: 20170157569
    Abstract: A blood purifier comprises hollow fiber membranes allowing a dialysing fluid or a filtrated fluid to flow outside. The membrane has an effective length of 10 mm or more and 150 mm or less. A maximum value of a permeation flux Jv obtained by dividing a volume of a permeate fluid permeating through the membranes by a membrane area of the hollow fiber membranes and time, is represented as Jvmax. A linear velocity of blood flowing in the membrane is represented as uB. A pressure difference between blood flowing inside the membranes and a fluid flowing outside the membranes is represented as TMP. When a filling blood volume into the membranes per unit membrane area is 20 mL/m2 or more and 35 mL/m2 or less and Jvmax/uB has a value of 0.00015 or more and 0.0006 or less, a TMP change rate is 0.95 or more and 1.05 or less.
    Type: Application
    Filed: July 8, 2014
    Publication date: June 8, 2017
    Applicants: UNIVERSITY OF YAMANASHI, SCHOOL JURIDICAL PERSON KITASATO INSTITUTE, NIPRO CORPORATION
    Inventors: Kenichi MATSUDA, Kenichi KOKUBO, Hirosuke KOBAYASHI, Takashi SUNOHARA, Syunsuke NOTAZAWA, Hiroshi FUKUSHIMA
  • Patent number: 9101556
    Abstract: Treatment for alleviating ischemia-reperfusion injury which has minimized risk of side effects and which can suppress neutrophilic infiltration and activation of platelets during ischemia reperfusion comprises administration by inhalation of a mixed gas comprising 21%-98% oxygen, 0.1%-4% hydrogen, 40-80 ppm nitrogen monoxide, and a remainder of inert gas such as nitrogen or helium to a patient undergoing reperfusion from immediately before the start of ischemia reperfusion until shortly after the start of reperfusion.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: August 11, 2015
    Assignee: The Kitasato Institute
    Inventors: Hirosuke Kobayashi, Toshihiro Shimbo, Kenichi Kokubo
  • Publication number: 20130108715
    Abstract: Treatment for alleviating ischemia-reperfusion injury which has minimized risk of side effects and which can suppress neutrophilic infiltration and activation of platelets during ischemia reperfusion comprises administration by inhalation of a mixed gas comprising 21%-98% oxygen, 0.1%-4% hydrogen, 40-80 ppm nitrogen monoxide, and a remainder of inert gas such as nitrogen or helium to a patient undergoing reperfusion from immediately before the start of ischemia reperfusion until shortly after the start of reperfusion.
    Type: Application
    Filed: March 2, 2011
    Publication date: May 2, 2013
    Applicant: SCHOOL JURIDICAL PERSON KITASATO INSTITUTE
    Inventors: Hirosuke Kobayashi, Toshihiro Shimbo, Kenichi Kokubo
  • Patent number: 6983378
    Abstract: A memory stores confidential data Da. An unqualified person who intends to irregularly read out the confidential data Da tries to open a cover of a housing, break the housing, or drill through the housing. The housing deflects by physical impact applied thereto. Positional relations among pairs of electrodes also deflects in accordance with the deflection of the housing. The deflection of the positional relations among the electrodes shifts capacitance at the electrodes. A data management processor deletes the confidential data Da when it detects the capacitance shifts.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: January 3, 2006
    Assignee: NEC Corporation
    Inventor: Kenichi Kokubo
  • Patent number: 6477650
    Abstract: In a data secret protecting system received in a casing, a data holding memory device holds important data. A distortion detecting device detects a distortion value of the casing to produce a detected distortion value. An important data controlling device compares the detected distortion value with a reference distortion value to produce a compared distortion signal when the detected distortion value is greater than the reference distortion value. The important data controlling device erases, in response to the compared distortion signal, the important data. The data secret protecting system may comprise a temperature measuring device which measures a temperature value of the case to produce a measured temperature value. In this event, the important data controlling device corrects, in response to the measured temperature value, the detected distortion value to produce a corrected value of the detected distortion value.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: November 5, 2002
    Assignee: NEC Corp.
    Inventor: Kenichi Kokubo
  • Patent number: 6127888
    Abstract: There is disclosed a power amplification device for BTL-driving a load with a half-wave signal whose output direct current level is set close to an earth level, in which output signals of first and second output amplifiers (2) and (3) are added in an adder circuit (10). A higher output signal is selected from the two output signals and generated as an output signal c. Output currents of variable current sources (8) and (9) of the first and second output amplifiers (2) and (3) are controlled in response to the output signal c to change operating currents of the first and second output amplifiers (2) and (3). The operating currents are enlarged only when the output signals of the first and second output amplifiers (2) and (3) are enlarged. Thereby, the efficiency of the operating current of BTL drive type output amplifier is enhanced.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: October 3, 2000
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Kenichi Kokubo
  • Patent number: 6037839
    Abstract: When first and fourth output transistors (15) and (18) are turned on, the voltage at the connecting point between the first and second driving transistors (19) and (20) drops. When second and third output transistors (16) and (17) are turned on, the voltage at the connecting point between third and fourth driving transistors (21) and (22) drops. As a result, voltage differences between the collectors and emitters of the first and second input transistors (2), (3) and the first and second current source transistors (13) and (14) increase so that saturation of the first and second current source transistors (13) and (14) can be prevented. Since a resistor is connected between a connecting point between upper and lower output transistors and a connecting point between upper and lower driving transistors having inverted phases from the former two transistors, current is limited and oscillation can be prevented.
    Type: Grant
    Filed: October 27, 1998
    Date of Patent: March 14, 2000
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kenichi Kokubo, Koji Tatani, Takayuki Taira
  • Patent number: 5973555
    Abstract: In a power amplifier apparatus comprising four amplifiers, each amplifier is adapted to amplify the half-wave output signal of a first differential amplifier by means of second and third output amplifiers (2, 3) to drive load (4) by their output amplifying signals and add the output amplifying signals by means of a non-linear circuit (5) in order to control the output DC voltage with the output signal of a second differential amplifier (6) according to the difference between the signal obtained by the non-linear addition and reference value Vref. Feedback signals X and Y of the left front first differential amplifier (1LF) and feedback signals X' and Y' of the right rear first differential amplifier (1RR) are applied to a single clip detection circuit 9 so that any clip in the output signal of the first and second output amplifiers can be detected by means of the feedback signals X, Y, X' and Y'.
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: October 26, 1999
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kenichi Kokubo, Takayuki Taira
  • Patent number: 5920229
    Abstract: In a power amplifier apparatus, a positive output signal of left front output amplifier (2LF), a negative output signal of left rear output amplifier (3LR), a negative output signal of right front output amplifier (3RF), and a positive output signal of right rear output amplifier (4RR) are applied to an adder (9), which selects the signal showing the highest level out of the four signals and generates a voltage corresponding to the selected signal. Switching power source (10) is adapted to operate according to the output signal of the adder (9) and produces a power source voltage to each of the high efficiency amplifiers. The positive output signal of the left front output amplifier and that of the right rear output amplifier are identical and substantially in-phase, whereas the negative output signal of the left rear output amplifier and that of the right front output amplifier are identical and substantially in-phase.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: July 6, 1999
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Kenichi Kokubo
  • Patent number: 5530456
    Abstract: Light rays emitted from light-emitting units pass through a window of a housing and are reflected by a finger pad of a finger. The reflected light rays again pass through the window and are received by light-receiving elements of each of light-receiving units. These light-receiving elements output reflected light detection signals corresponding to the ridges and recesses of the finger pad. From these reflected light detection signals, a wave-shaping unit outputs rectangular wave signals indicating the moving amount of the finger pad and moving direction signals indicating the moving direction of the finger pad for the individual axes.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: June 25, 1996
    Assignee: NEC Corporation
    Inventor: Kenichi Kokubo
  • Patent number: 5160897
    Abstract: The present invention provides a B class push-pull amplifying circuit suitable for use in a headphone type tape recorder and the like. The amplifying circuit utilizes a current mirror circuit system in its output transistors to provide an idling current for compensating for crossover distortion by using the mirror ratio. The current mirror circuit system includes a pair of output current mirror circuits complimentarily coupled with each other. One branch of these output current mirror circuits includes a diode-connected transistor, the emitter current path of which is ON-OFF controlled by a drive transistor in the other branch. Thus, when no signal is input, the respective one of the current mirror output circuits complimentarily coupled with each other functions as a current mirror circuit such that the small idling current determined by the mirror ratio will pass therethrough.
    Type: Grant
    Filed: August 29, 1991
    Date of Patent: November 3, 1992
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Masanori Fujisawa, Kenichi Kokubo