Patents by Inventor Ikuhiro Tsumura
Ikuhiro Tsumura 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: 9211399Abstract: A disposable electrode includes: an electrode pad; and a connector, connecting the electrode pad to a defibrillator, and including an information holder that can be provided with a transmissive opening or a light reflective member, the information holder holding information about at least an expiration date, depending on presence or absence of the transmissive opening or the light reflective member, the information holder allowing the information to be notified from the defibrillator when the connector is connected to the defibrillator.Type: GrantFiled: September 11, 2009Date of Patent: December 15, 2015Assignee: NIHON KOHDEN CORPORATIONInventors: Ikuhiro Tsumura, Hiroyuki Nishiyama, Yuji Igawa, Yohiyuki Hamauzu
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Publication number: 20100070011Abstract: A disposable electrode includes: an electrode pad; and a connector, connecting the electrode pad to a defibrillator, and including an information holder that can be provided with a transmissive opening or a light reflective member, the information holder holding information about at least an expiration date, depending on presence or absence of the transmissive opening or the light reflective member, the information holder allowing the information to be notified from the defibrillator when the connector is connected to the defibrillator.Type: ApplicationFiled: September 11, 2009Publication date: March 18, 2010Applicant: Nihon Kohden CorporationInventors: Ikuhiro Tsumura, Hiroyuki Nishiyama, Yuji Igawa, Yoshiyuki Hamauzu
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Patent number: 6947793Abstract: An electrotherapy apparatus for generating first and second waveforms having reversed polarities. When the waveform of the electric energy outputted from the output electrodes 112a and 112b is the positive phase, the inductor 105, electric energy storage section 104, the first switch means 101, output electrode 112a, patient 113, and the output electrode 112b are connected so that these can form the closed circuit. In the case where the waveform of the electric energy outputted from the output electrodes 112a and 112b is the negative phase, when the first switch means 101 is closed, the inductor 105 and the electric energy storage section 104 form the closed circuit, and when the first switch means 101 is opened, the inductor 105 and the electric energy storage section 104 are electrically separated, and the delivery of the electric energy to the output electrodes 112a, and 112b is conducted by the inductor 105.Type: GrantFiled: March 8, 2001Date of Patent: September 20, 2005Assignee: Nihon Kohden CorporationInventors: Naoto Akiyama, Masahiko Inomata, Ikuhiro Tsumura
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Patent number: 6836161Abstract: To provide a semiconductor switch driving circuit in which a stable conducting state and a non-conducting state can be kept, the high-speed switching operation is enabled, a lag of switching timing is minimized and which has a simple circuit, the semiconductor switch driving circuit for driving a semiconductor switch in which multistage switching devices (IGBT) are connected includes a transformer, a primary side and a secondary side and is configured so that voltage between the gate and the emitter of a switching device can be continuously kept positive, voltage between the gate and the emitter can be continuously kept negative, voltage between the gate and the emitter is alternately switched to positive voltage or negative voltage.Type: GrantFiled: March 22, 2001Date of Patent: December 28, 2004Assignee: Nihon Kohden CorporationInventors: Naoto Akiyama, Masahiko Inomata, Ikuhiro Tsumura
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Patent number: 6628492Abstract: The invention has an object of providing a disarm circuit using a semiconductor switch device that can secure the safety of an electrotherapy apparatus by disarming even if the control of the semiconductor switch is disabled because of some cause. Therefore, the disarm circuit is provided with a transformer, its primary side area, its secondary side area, a resistor for disarming and the semiconductor switch device. The secondary side area is characterized in that a resistor for limiting excessive current for automatically turning on the semiconductor switch device by stored electric energy is connected between a positive terminal of an electric energy storage section and the gate of the semiconductor switch device.Type: GrantFiled: May 15, 2001Date of Patent: September 30, 2003Assignee: Nihon Kohden CorporationInventors: Naoto Akiyama, Masahiko Inomata, Ikuhiro Tsumura
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Publication number: 20020022867Abstract: The apparatus is structured in such a manner that, when the waveform of the electric energy outputted from the output electrodes 112a and 112b is the positive phase, the inductor 105, electric energy storage section 104, the first switch means 101, output electrode 112a, patient 113, and the output electrode 112b are connected so that these can form the closed circuit, and in the case where the waveform of the electric energy outputted from the output electrodes 112a and 112b is the negative phase, when the first switch means 101 is closed, the inductor 105 and the electric energy storage section 104 form the closed circuit, and when the first switch means 101 is opened, the inductor 105 and the electric energy storage section 104 are electrically separated, and the delivery of the electric energy to the output electrodes 112a, and 112b is conducted by the inductor 105.Type: ApplicationFiled: March 8, 2001Publication date: February 21, 2002Inventors: Naoto Akiyama, Masahiko Inomata, Ikuhiro Tsumura
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Publication number: 20010043451Abstract: The invention has an object of providing a disarm circuit using a semiconductor switch device that can secure the safety of an electrotherapy apparatus by disarming even if the control of the semiconductor switch is disabled because of some cause. Therefore, the disarm circuit is provided with a transformer, its primary side area, its secondary side area, a resistor for disarming and the semiconductor switch device. The secondary side area is characterized in that a resistor for limiting excessive current for automatically turning on the semiconductor switch device by stored electric energy is connected between a positive terminal of an electric energy storage section and the gate of the semiconductor switch device.Type: ApplicationFiled: May 15, 2001Publication date: November 22, 2001Applicant: NIHON KOHDEN CORPORATIONInventors: Naoto Akiyama, Masahiko Inomata, Ikuhiro Tsumura
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Publication number: 20010044640Abstract: To provide a semiconductor switch driving circuit in which a stable conducting state and a non-conducting state can be kept, the high-speed switching operation is enabled, a lag of switching timing is minimized and which has a simple circuit, the semiconductor switch driving circuit for driving a semiconductor switch in which multistage switching devices (IGBT) are connected includes a transformer, a primary side and a secondary side and is configured so that voltage between the gate and the emitter of a switching device can be continuously kept positive, voltage between the gate and the emitter can be continuously kept negative, voltage between the gate and the emitter is alternately switched to positive voltage or negative voltageType: ApplicationFiled: March 22, 2001Publication date: November 22, 2001Inventors: Naoto Akiyama, Masahiko Inomata, Ikuhiro Tsumura
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Patent number: 5376104Abstract: In a defibrillator with an electrocardiographic monitor which monitors electrocardiographic signals induced at electrodes by means of a preamplifier and supplying the signals to an electrocardiographic signal processing circuit through high-pass filters, the dynamic range of a preamplifier is made wider in accordance with the amplitude of a polarization voltage which is developed when a defibrillator is operated. A high-pass filter is formed of a first high-pass filter which operates in a normal state and a second high-pass filter whose blocking frequency is higher than that of the first high-pass filter so that the polarization voltage is attenuated without erasing the electrocardiographic signals. The second high-pass filter is operated in synchronization with the operation of the defibrillator during a time period corresponding to the time period in which the polarization voltage is generated.Type: GrantFiled: February 2, 1993Date of Patent: December 27, 1994Assignee: Nihon Kohden CorporationInventors: Yoshio Sakai, Ikuhiro Tsumura, Nobutaka Kobayashi