Patents by Inventor Hideaki Hirahara
Hideaki Hirahara 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: 10349842Abstract: A blood pressure measuring apparatus, which measures a blood pressure of a living body, includes: a cuff-pressure control unit which controls a cuff pressure of a cuff that presses a part of the living body; an oscillation signal detection unit which detects an oscillation signal from the cuff pressure; a blood pressure specification unit which specifies systolic and diastolic blood pressures as the blood pressure of the living body from the oscillation signal; and a blood pressure determination unit which determines whether systolic and diastolic blood pressures are appropriate or not.Type: GrantFiled: August 17, 2011Date of Patent: July 16, 2019Assignee: Nihon Kohden CorporationInventors: Takashi Usuda, Yoshiharu Kikuchi, Hideaki Hirahara, Naoki Kobayashi, Katsuyoshi Suzuki
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Patent number: 9622667Abstract: A blood pressure measuring apparatus which measures a blood pressure in a step of gradually changing a cuff pressure adapted to press an artery, includes: a pulse wave detecting unit; a pulse wave interval measuring unit; a waveform information storing unit; a change trend calculating unit; a waveform information comparing unit; and a determining unit which, when first two of the pulse waves, which are successively detected at different cuff pressures, satisfy a predetermined condition: that a magnitude relationship between the amplitudes of the first two of the pulse waves is consistent with the change trend of the first two of the pulse waves; that the pulse wave interval between the first two of the pulse waves is within a predetermined range; and that the waveform information of the first two of the pulse waves approximately coincide with each other, determines that the amplitude of latter one of the first two of the pulse waves is to be used for calculating the blood pressure value.Type: GrantFiled: August 12, 2015Date of Patent: April 18, 2017Assignee: NIHON KOHDEN CORPORATIONInventor: Hideaki Hirahara
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Patent number: 9526444Abstract: A biological signal measuring apparatus includes: a light emitter which emits at least two light beams having different wavelengths to living tissue of a subject; a light receiver which receives the light beams that are emitted from the light emitter, and which converts at least one of the light beams to at least one electric signal that corresponds to a reception light intensity of the at least one of the light beams; a detector which detects temporal variation of the reception light intensity from the electric signal; a selector which selects a pulse oximeter mode in which at least one of an oxygen saturation and a pulse rate is calculated and a capillary refilling time measurement mode in which a capillary refilling time is calculated; and a calculator which, based on the temporal variation of the reception light intensity, performs a calculation in the mode selected by the selector.Type: GrantFiled: November 9, 2011Date of Patent: December 27, 2016Assignee: NIHON KOHDEN CORPORATIONInventors: Naoki Kobayashi, Kazumasa Ito, Hideaki Hirahara
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Publication number: 20150342473Abstract: A blood pressure measuring apparatus which measures a blood pressure in a step of gradually changing a cuff pressure adapted to press an artery, includes: a pulse wave detecting unit; a pulse wave interval measuring unit; a waveform information storing unit; a change trend calculating unit; a waveform information comparing unit; and a determining unit which, when first two of the pulse waves, which are successively detected at different cuff pressures, satisfy a predetermined condition: that a magnitude relationship between the amplitudes of the first two of the pulse waves is consistent with the change trend of the first two of the pulse waves; that the pulse wave interval between the first two of the pulse waves is within a predetermined range; and that the waveform information of the first two of the pulse waves approximately coincide with each other, determines that the amplitude of latter one of the first two of the pulse waves is to be used for calculating the blood pressure value.Type: ApplicationFiled: August 12, 2015Publication date: December 3, 2015Applicant: NIHON KOHDEN CORPORATIONInventor: Hideaki HIRAHARA
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Patent number: 9119537Abstract: A blood pressure measuring apparatus which measures a blood pressure in a step of gradually changing a cuff pressure adapted to press an artery, includes: a pulse wave detecting unit; a pulse wave interval measuring unit; a waveform information storing unit; a change trend calculating unit; a waveform information comparing unit; and a determining unit which, when first two of the pulse waves, which are successively detected at different cuff pressures, satisfy a predetermined condition: that a magnitude relationship between the amplitudes of the first two of the pulse waves is consistent with the change trend of the first two of the pulse waves; that the pulse wave interval between the first two of the pulse waves is within a predetermined range; and that the waveform information of the first two of the pulse waves approximately coincide with each other, determines that the amplitude of latter one of the first two of the pulse waves is to be used for calculating the blood pressure value.Type: GrantFiled: May 19, 2011Date of Patent: September 1, 2015Assignee: NIHON KOHDEN CORPORATIONInventor: Hideaki Hirahara
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Patent number: 8374530Abstract: Methods and apparatus to develop an electrostatic latent image using conductive particles, such as carbon and metal particles with a low resistance value, without treating the surface with insulation membrane or other insulators that generate impurities in the conductive material printed by the imaging system.Type: GrantFiled: June 20, 2006Date of Patent: February 12, 2013Assignee: Afit CorporationInventors: Hideaki Hirahara, Takaaki Konuma, Norio Yamagishi
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Publication number: 20120130211Abstract: A biological signal measuring apparatus includes: a light emitter which emits at least two light beams having different wavelengths to living tissue of a subject; a light receiver which receives the light beams that are emitted from the light emitter, and which converts at least one of the light beams to at least one electric signal that corresponds to a reception light intensity of the at least one of the light beams; a detector which detects temporal variation of the reception light intensity from the electric signal; a selector which selects a pulse oximeter mode in which at least one of an oxygen saturation and a pulse rate is calculated and a capillary refilling time measurement mode in which a capillary refilling time is calculated; and a calculator which, based on the temporal variation of the reception light intensity, performs a calculation in the mode that is selected by the selector.Type: ApplicationFiled: November 9, 2011Publication date: May 24, 2012Applicant: NIHON KOHDEN CORPORATIONInventors: Naoki KOBAYASHI, Kazumasa ITO, Hideaki HIRAHARA
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Publication number: 20120046561Abstract: A blood pressure measuring apparatus, which measures a blood pressure of a living body, includes: a cuff-pressure control unit which controls a cuff pressure of a cuff that presses a part of the living body; an oscillation signal detection unit which detects an oscillation signal from the cuff pressure; a blood pressure specification unit which specifies systolic and diastolic blood pressures as the blood pressure of the living body from the oscillation signal; and a blood pressure determination unit which determines whether systolic and diastolic blood pressures are appropriate or not.Type: ApplicationFiled: August 17, 2011Publication date: February 23, 2012Applicant: NIHON KOHDEN CORPORATIONInventors: Takashi USUDA, Yoshiharu KIKUCHI, Hideaki HIRAHARA, Naoki KOBAYASHI, Katsuyoshi SUZUKI
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Publication number: 20110288423Abstract: A blood pressure measuring apparatus which measures a blood pressure in a step of gradually changing a cuff pressure adapted to press an artery, includes: a pulse wave detecting unit; a pulse wave interval measuring unit; a waveform information storing unit; a change trend calculating unit; a waveform information comparing unit; and a determining unit which, when first two of the pulse waves, which are successively detected at different cuff pressures, satisfy a predetermined condition: that a magnitude relationship between the amplitudes of the first two of the pulse waves is consistent with the change trend of the first two of the pulse waves; that the pulse wave interval between the first two of the pulse waves is within a predetermined range; and that the waveform information of the first two of the pulse waves approximately coincide with each other, determines that the amplitude of latter one of the first two of the pulse waves is to be used for calculating the blood pressure value.Type: ApplicationFiled: May 19, 2011Publication date: November 24, 2011Applicant: NIHON KOHDEN CORPORATIONInventor: Hideaki HIRAHARA
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Publication number: 20070031169Abstract: Methods and apparatus to develop an electrostatic latent image using conductive particles, such as carbon and metal particles with a low resistance value, without treating the surface with insulation membrane or other insulators that generate impurities in the conductive material printed by the imaging system.Type: ApplicationFiled: June 20, 2006Publication date: February 8, 2007Inventors: Hideaki Hirahara, Takaaki Konuma, Norio Yamagishi
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Patent number: 5766125Abstract: Light beams of different wavelengths, emitted from a light generating device, are transmitted through a living tissue. The transmitted light beams are converted into electrical signals by a photoelectric transducing device. A pulsation calculating device calculates a pulsation of an absorbance of tissue of a living tissue for each wavelength on the basis of the output signal of the photoelectric transducing device. By using this, a pulsation ratio calculating device calculates the ratio of the pulsations of the absorbance values. A concentration calculating device puts the output signal of the pulsation ratio calculating device into a formula having a single unknown on the tissue term, which is constructed on the basis of the fact that a predetermined relation is present between the tissue terms of the respective wavelengths, thereby calculating a value of the tissue term and the concentration of light absorbing material in blood.Type: GrantFiled: April 27, 1995Date of Patent: June 16, 1998Assignee: Nihon Kohden CorporationInventors: Takuo Aoyagi, Masayoshi Fuse, Michio Kanemoto, Cheng-tai Xie, Naoki Kobayashi, Hideaki Hirahara
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Patent number: 5309206Abstract: A developing device comprising: a drive roller which is driven so as to be rotated; a developing sleeve which is formed by a thin film and has a peripheral length slightly larger than that of the drive roller so as to be fitted around the drive roller; a press member which presses the developing sleeve against the drive roller at one side of the drive roller so as to form a sag portion of the developing sleeve such that the sag portion is brought into contact with an electrostatic latent image support member; and an electric field forming member for forming alternating electric field such that an attractive force capable of bringing the developing sleeve and the electrostatic latent image support member into contact with each other is applied between the developing sleeve and the electrostatic latent image support member.Type: GrantFiled: May 22, 1992Date of Patent: May 3, 1994Assignee: Minolta Camera Kabushiki KaishaInventors: Satoshi Deishi, Hiroshi Mizuno, Toshimitsu Fujiwara, Toshiya Natsuhara, Masami Matsuura, Hideo Yamaki, Hideaki Hirahara
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Patent number: 4814820Abstract: An electrostatic latent image developing apparatus has a developing sleeve, an agitating roller rotatable in the same direction as the developing sleeve and a magnetic device fixedly provided within the developing sleeve and having a plurality of N and S poles which include auxiliary poles of the same polarity adjacent to each other circumferentially of the sleeve and opposed to the agitating roller. A developer restraining plate between the developing sleeve and the agitating roller has a first guide surface for guiding the developer supplied by the agitating roller and a second guide surface for limiting the developer used from moving toward the sleeve portion to which the developer is supplied by the agitating roller.Type: GrantFiled: May 6, 1988Date of Patent: March 21, 1989Assignee: Minolta Camera Kabushiki KaishaInventors: Hideaki Hirahara, Tatsuo Takabe, Kazuya Ishida, Hiromitsu Saijo, Shinya Matsuda, Masaru Komura