Patents by Inventor Kenichi Matsuda
Kenichi Matsuda 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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Publication number: 20210139917Abstract: A peptide cyclase that has the amino acid sequence represented by SEQ ID NO: 1 or a mutated sequence thereof, or a peptide cyclase that has an amino acid sequence encoded by a base sequence encoding the amino acid sequence represented by SEQ ID NO: 1 or a mutated sequence thereof; DNA encoding the peptide cyclase; a method for producing the peptide cyclase; and a method for producing a cyclic peptide using the peptide cyclase.Type: ApplicationFiled: April 25, 2019Publication date: May 13, 2021Applicant: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Toshiyuki WAKIMOTO, Takefumi KURANAGA, Kenichi MATSUDA
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Publication number: 20170157569Abstract: 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: ApplicationFiled: July 8, 2014Publication date: June 8, 2017Applicants: UNIVERSITY OF YAMANASHI, SCHOOL JURIDICAL PERSON KITASATO INSTITUTE, NIPRO CORPORATIONInventors: Kenichi MATSUDA, Kenichi KOKUBO, Hirosuke KOBAYASHI, Takashi SUNOHARA, Syunsuke NOTAZAWA, Hiroshi FUKUSHIMA
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Publication number: 20150011912Abstract: A peristaltic sound detection apparatus (10) includes matching coefficient calculation means for calculating a plurality of matching coefficients by individually matching a frequency spectrum of a biological sound and a plurality of standard frequency spectra of peristaltic sounds.Type: ApplicationFiled: January 25, 2013Publication date: January 8, 2015Inventors: Norihiro Matsuoka, Kenichi Matsuda, Osamu Sakata, Norikazu Harii
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Patent number: 7868286Abstract: A vehicle-mounted imaging device that is mounted in an automobile and performs color imaging has been provided with a plurality of two-dimensionally arranged pixel cells. In each of the pixels, a color filter separates incident light by a multilayer interference filter. The multilayer interference filter is composed of two ?/4 multilayer films and a spacer layer sandwiched therebetween. The multilayer interference filter transmits light in a wavelength region that corresponds to an optical thickness of the spacer layer. The ?/4 multilayer films and spacer layer are composed of inorganic materials.Type: GrantFiled: April 21, 2009Date of Patent: January 11, 2011Assignee: Panasonic CorporationInventors: Kenichi Matsuda, Yuuichi Inaba, Shinji Yoshida, Takumi Yamaguchi
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Patent number: 7773646Abstract: A semiconductor light source includes a light-emitting device 101 having a plurality of semiconductor layers made of nitride semiconductors, and a drive circuit 102 for driving the light-emitting device 101. The drive circuit 102 performs forward drive operation, in which a forward current is supplied to the light-emitting device to make the light-emitting device 101 emit light, and reverse drive operation, in which a reverse bias is applied to the light-emitting device. The magnitude of the reverse bias is limited by the value of a reverse current flowing through the light-emitting device.Type: GrantFiled: March 14, 2007Date of Patent: August 10, 2010Assignee: Panasonic CorporationInventors: Daisuke Ueda, Masaaki Yuri, Katsumi Sugiura, Kenichi Matsuda
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Patent number: 7738525Abstract: A semiconductor laser (101) includes a first cladding layer (103), an active layer (105) and a second cladding layer (108). A window region (115) including fluorine, that is, an impurity element with higher electronegativity than nitrogen, is formed in the vicinity of a front end face (113) and a rear end face (114) of a laser resonator. The window region (115) is formed by exposing the front end face (113) and the rear end face (114) to carbon fluoride (CF4) plasma. The effective band gap of a portion of the active layer (105) disposed in the window region (115) is larger than the effective band gap of another portion of the active layer, and hence, it functions as an end face window structure for suppressing COD.Type: GrantFiled: July 9, 2007Date of Patent: June 15, 2010Assignee: Panasonic CorporationInventors: Daisuke Ueda, Masaaki Yuri, Yoshiaki Hasegawa, Kenichi Matsuda
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Patent number: 7719588Abstract: Provided is a solid-state imaging device which is able to achieve reductions in size and in thickness of the device, while being also able to have an auxiliary function of imaging lenses, an infrared cut filter, an antireflection function, a dust preventing function for downsizing of packaging, and an infrared light imaging function for capturing images at night. The solid-state imaging device includes: a light-collecting element which collects incident light; and a transparent thin film formed above the light-collecting element, and an air gap is formed between the light-collecting element and the transparent thin film. On the transparent thin film, the auxiliary function of imaging lenses, the infrared cut filter, the antireflection function, the dust preventing function for downsizing of packaging, and the infrared light imaging function for capturing images at night are integrated.Type: GrantFiled: August 9, 2007Date of Patent: May 18, 2010Assignee: Panasonic CorporationInventors: Kazutoshi Onozawa, Kenichi Matsuda
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Publication number: 20090201371Abstract: A vehicle-mounted imaging device that is mounted in an automobile and performs color imaging has been provided with a plurality of two-dimensionally arranged pixel cells. In each of the pixels, a color filter separates incident light by a multilayer interference filter. The multilayer interference filter is composed of two ?/4 multilayer films and a spacer layer sandwiched therebetween. The multilayer interference filter transmits light in a wavelength region that corresponds to an optical thickness of the spacer layer. The ?/4 multilayer films and spacer layer are composed of inorganic materials.Type: ApplicationFiled: April 21, 2009Publication date: August 13, 2009Applicant: PANASONIC CORPORATIONInventors: Kenichi MATSUDA, Yuuichi Inaba, Shinji Yoshida, Takumi Yamaguchi
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Patent number: 7560684Abstract: A vehicle-mounted imaging device that is mounted in an automobile and performs color imaging has been provided with a plurality of two-dimensionally arranged pixel cells. In each of the pixels, a color filter separates incident light by a multilayer interference filter. The multilayer interference filter is composed of two ?/4 multilayer films and a spacer layer sandwiched therebetween. The multilayer interference filter transmits light in a wavelength region that corresponds to an optical thickness of the spacer layer. The ?/4 multilayer films and spacer layer are composed of inorganic materials.Type: GrantFiled: March 7, 2006Date of Patent: July 14, 2009Assignee: Panasonic CorporationInventors: Kenichi Matsuda, Yuuichi Inaba, Shinji Yoshida, Takumi Yamaguchi
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Publication number: 20090135875Abstract: A semiconductor laser (101) includes a first cladding layer (103), an active layer (105) and a second cladding layer (108). A window region (115) including fluorine, that is, an impurity element with higher electronegativity than nitrogen, is formed in the vicinity of a front end face (113) and a rear end face (114) of a laser resonator. The window region (115) is formed by exposing the front end face (113) and the rear end face (114) to carbon fluoride (CF4) plasma. The effective band gap of a portion of the active layer (105) disposed in the window region (115) is larger than the effective band gap of another portion of the active layer, and hence, it functions as an end face window structure for suppressing COD.Type: ApplicationFiled: July 9, 2007Publication date: May 28, 2009Inventors: Daisuke Ueda, Masaaki Yuri, Yoshiaki Hasegawa, Kenichi Matsuda
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Publication number: 20090014752Abstract: A semiconductor light source includes a light-emitting device 101 having a plurality of semiconductor layers made of nitride semiconductors, and a drive circuit 102 for driving the light-emitting device 101. The drive circuit 102 performs forward drive operation, in which a forward current is supplied to the light-emitting device to make the light-emitting device 101 emit light, and reverse drive operation, in which a reverse bias is applied to the light-emitting device. The magnitude of the reverse bias is limited by the value of a reverse current flowing through the light-emitting device.Type: ApplicationFiled: March 14, 2007Publication date: January 15, 2009Inventors: Daisuke Ueda, Masaaki Yuri, Katsumi Sugiura, Kenichi Matsuda
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Publication number: 20080291303Abstract: Provided is a solid-state imaging device which is able to achieve reductions in size and in thickness of the device, while being also able to have an auxiliary function of imaging lenses, an infrared cut filter, an antireflection function, a dust preventing function for downsizing of packaging, and an infrared light imaging function for capturing images at night. The solid-state imaging device includes: a light-collecting element which collects incident light; and a transparent thin film formed above the light-collecting element, and an air gap is formed between the light-collecting element and the transparent thin film. On the transparent thin film, the auxiliary function of imaging lenses, the infrared cut filter, the antireflection function, the dust preventing function for downsizing of packaging, and the infrared light imaging function for capturing images at night are integrated.Type: ApplicationFiled: August 9, 2007Publication date: November 27, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Kazutoshi ONOZAWA, Kenichi MATSUDA
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Publication number: 20080135740Abstract: A vehicle-mounted imaging device that is mounted in an automobile and performs color imaging has been provided with a plurality of two-dimensionally arranged pixel cells. In each of the pixels, a color filter separates incident light by a multilayer interference filter. The multilayer interference filter is composed of two ?/4 multilayer films and a spacer layer sandwiched therebetween. The multilayer interference filter transmits light in a wavelength region that corresponds to an optical thickness of the spacer layer. The ?/4 multilayer films and spacer layer are composed of inorganic materials.Type: ApplicationFiled: March 7, 2006Publication date: June 12, 2008Inventors: Kenichi Matsuda, Inaba Yuuichi, Shinji Yoshida, Takumi Yamaguchi
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Patent number: 7362935Abstract: The dual wavelength semiconductor laser source for an optical pickup includes: two semiconductor laser elements outputting laser beams having oscillating wavelengths different from each other; and a multiplexing waveguide, formed inside of a photonic crystal having a photonic band gap, having one output end outputting laser light at one end surface and two input ends at the other end surfaces. Output beams of the two semiconductor laser elements are coupled to the respective two input ends of the multiplexing waveguide and the two beams are outputted from the one output end of the multiplexing waveguide.Type: GrantFiled: March 11, 2005Date of Patent: April 22, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Susumu Koike, Kenichi Matsuda
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Patent number: 6941046Abstract: The dual wavelength semiconductor laser source for an optical pickup includes: two semiconductor laser elements outputting laser beams having oscillating wavelengths different from each other; and a multiplexing waveguide, formed inside of a photonic crystal having a photonic band gap, having one output end outputting laser light at one end surface and two input ends at the other end surfaces. Output beams of the two semiconductor laser elements are coupled to the respective two input ends of the multiplexing waveguide and the two beams are outputted from the one output end of the multiplexing waveguide.Type: GrantFiled: January 24, 2003Date of Patent: September 6, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Susumu Koike, Kenichi Matsuda
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Publication number: 20050163175Abstract: The dual wavelength semiconductor laser source for an optical pickup includes: two semiconductor laser elements outputting laser beams having oscillating wavelengths different from each other; and a multiplexing waveguide, formed inside of a photonic crystal having a photonic band gap, having one output end outputting laser light at one end surface and two input ends at the other end surfaces. Output beams of the two semiconductor laser elements are coupled to the respective two input ends of the multiplexing waveguide and the two beams are outputted from the one output end of the multiplexing waveguide.Type: ApplicationFiled: March 11, 2005Publication date: July 28, 2005Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Susumu Koike, Kenichi Matsuda
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Patent number: 6909083Abstract: A filter layer and a buffer layer are sequentially laminated on a first principal face of a semiconductor substrate, and an island-shaped light absorption layer and a window layer are laminated on top of the buffer layer. A diffusion region in which p-type impurities have been diffused is formed in the window layer. An n-side electrode and a p-side electrode are formed on the buffer layer and the diffusion region, respectively. A light incidence portion is formed on the buffer layer where the light absorption layer has not been formed.Type: GrantFiled: February 4, 2003Date of Patent: June 21, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Kenichi Matsuda
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Patent number: 6740861Abstract: A photodetector includes semiconductor conductive layer, light-absorbing layer and wide bandgap layer, which are stacked in this order on a semi-insulating semiconductor substrate. The conductive layer has been formed on a surface region of the substrate. The photodetector further includes a doped region defined in part of the wide bandgap layer. The conductive layer has etch susceptibility different from that of the substrate.Type: GrantFiled: May 16, 2003Date of Patent: May 25, 2004Assignee: Matsushita Electric Industrial Co., LTDInventor: Kenichi Matsuda
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Publication number: 20030197115Abstract: A photodetector includes semiconductor conductive layer, light-absorbing layer and wide bandgap layer, which are stacked in this order on a semi-insulating semiconductor substrate. The conductive layer has been formed on a surface region of the substrate. The photodetector further includes a doped region defined in part of the wide bandgap layer. The conductive layer has etch susceptibility different from that of the substrate.Type: ApplicationFiled: May 16, 2003Publication date: October 23, 2003Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventor: Kenichi Matsuda
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Patent number: 6627516Abstract: A light receiving device includes a semiconductor substrate, a light absorbing layer provided on the semiconductor substrate, a window layer provided on the light absorbing layer, a wavelength filter provided on the window layer, and a diffusion region provided in the wavelength filter and the window layer. A forbidden bandwidth of the wavelength filter is smaller than a forbidden bandwidth of the window layer, and a forbidden bandwidth of the light absorbing layer is smaller than the forbidden bandwidth of the wavelength filter.Type: GrantFiled: April 12, 2002Date of Patent: September 30, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Kenichi Matsuda