Patents by Inventor Akihito Fujii
Akihito Fujii 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: 11936441Abstract: A FrontHaul Multiplexer (FHM) for relaying communications between a signal processing device and a plurality of radio devices includes a storage unit that stores a table in which device identification information of each of the plurality of radio devices is associated with beam identification information assigned to the radio device; a scheduling information reception unit that receives, from the signal processing device, scheduling information of a user terminal performing radio communications with the plurality of radio devices; a determination unit that acquires from the table the device identification information associated with the beam identification information of uplink included in the scheduling information and then determines from the acquired device identification information the radio device in charge of the user terminal; and a transmission unit that transmits to the signal processing device an uplink signal transmitted from the determined radio device.Type: GrantFiled: November 9, 2018Date of Patent: March 19, 2024Assignee: NTT DOCOMO, INC.Inventors: Takashi Kosugi, Tatsuro Yajima, Takuto Arai, Yuta Sagae, Akihito Hanaki, Hidekazu Shimodaira, Masahiro Fujii, Yoshiaki Ofuji
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Patent number: 8883824Abstract: Disclosed is a compound represented by Formula (I) or a pharmaceutically acceptable salt thereof: wherein R1 is 1: a C3-8 cycloalkyl C1-4 alkyl group, 2: a C7-14 aralkyl group, in which the aryl moiety thereof is optionally substituted with the same or different 1 to 3 groups selected from the group consisting of: (a) halogen, (b) C1-4 alkyl, which is optionally substituted with 1 to 3 fluorine atoms, (c) C1-4 alkoxy, which is optionally substituted with 1 to 3 fluorine atoms, and (d) C1-4 alkylcarbonyl, which is optionally substituted with C1-4 alkoxy, 3: a five-to ten-membered heteroaryl-C1-4 alkyl group, in which the heteroaryl moiety thereof is optionally substituted with the same or different 1 to 3 groups selected from the group consisting of: (a) halogen, and (b) C1-4 alkyl, or 4: a C6-10 aryl C2-6 alkenyl group; and R2 is a cyano group or a nitro group.Type: GrantFiled: May 12, 2010Date of Patent: November 11, 2014Assignee: Sumitomo Dainippon Pharma Co., Ltd.Inventors: Akihito Fujii, Kazumi Niidome, Chiaki Migihashi, Toshiyuki Kamei, Takafumi Matsumoto, Tomoyuki Hirata
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Patent number: 8456769Abstract: Provided are a lens unit and a vehicle-mounted infrared lens unit capable of correcting a focal shift due to a temperature change without increasing the apparatus size, complicating a production process, and increasing the costs. In a vehicle-mounted infrared lens unit 4 configured such that a plurality of infrared lenses are held by a barrel 30 and a spacer 40 is interposed between two infrared lenses, a first infrared lens 10 is held sandwiched between the spacer 40 and a lens holding portion 31 of the barrel 30. The spacer 40 and the barrel 30 are formed of materials having different thermal expansion coefficients. An O-ring 60 is interposed between a lock portion 32 of the lens holding portion 31 and the first infrared lens 10. Thermal expansion of the spacer 40 allows the first infrared lens 10 to move in the axial direction against the elastic force of the O-ring 60. When the spacer 40 is shrunken, the elastic force of the O-ring 60 allows the first infrared lens 10 to move in the opposite direction.Type: GrantFiled: November 26, 2009Date of Patent: June 4, 2013Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kanji Teraoka, Akihito Fujii, Tatsuya Izumi
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Patent number: 8147949Abstract: A lower periphery constraint portion and an upper periphery constraint portion for molding the periphery of a lens as well as a mirror-finished optical molding surface and another mirror-finished optical molding surface are formed on a lower mold body and an upper mold body of a mold respectively. The upper periphery constraint portion and the lower periphery constraint portion are so formed as to have prescribed thicknesses ?1 and ?2 in a pressure axis direction respectively. A periphery nonconstraint portion not constraining ceramics when molding a ceramics material is provided between the lower mold body and the upper mold body. Thus, a ceramics molded component or the like is prevented from breakage and can be easily detached from the mold, so that the same can be more homogeneously densified.Type: GrantFiled: June 28, 2007Date of Patent: April 3, 2012Assignee: Sumitomo Electric Industries, Ltd.Inventors: Masato Hasegawa, Akihito Fujii
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Publication number: 20120059012Abstract: Disclosed is a compound represented by Formula (I) or a pharmaceutically acceptable salt thereof: wherein R1 is 1: a C3-8 cycloalkyl C1-4 alkyl group, 2: a C7-14 aralkyl group, in which the aryl moiety thereof is optionally substituted with the same or different 1 to 3 groups selected from the group consisting of: (a) halogen, (b) C1-4 alkyl, which is optionally substituted with 1 to 3 fluorine atoms, (c) C1-4 alkoxy, which is optionally substituted with 1 to 3 fluorine atoms, and (d) C1-4 alkylcarbonyl, which is optionally substituted with C1-4 alkoxy, 3: a five- to ten-membered heteroaryl-C1-4 alkyl group, in which the heteroaryl moiety thereof is optionally substituted with the same or different 1 to 3 groups selected from the group consisting of: (a) halogen, and (b) C1-4 alkyl, or 4: a C6-10 aryl C2-6 alkenyl group; and R2 is a cyano group or a nitro group.Type: ApplicationFiled: May 12, 2010Publication date: March 8, 2012Applicant: Dainippon Sumitomo Pharma Co., Ltd.Inventors: Akihito Fujii, Kazumi Niidome, Chiaki Migihashi, Toshiyuki Kamei, Takafumi Matsumoto, Tomoyuki Hirata
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Publication number: 20120019905Abstract: Provided are a lens unit and a vehicle-mounted infrared lens unit capable of correcting a focal shift due to a temperature change without increasing the apparatus size, complicating a production process, and increasing the costs. In a vehicle-mounted infrared lens unit 4 configured such that a plurality of infrared lenses are held by a barrel 30 and a spacer 40 is interposed between two infrared lenses, a first infrared lens 10 is held sandwiched between the spacer 40 and a lens holding portion 31 of the barrel 30. The spacer 40 and the barrel 30 are formed of materials having different thermal expansion coefficients. An O-ring 60 is interposed between a lock portion 32 of the lens holding portion 31 and the first infrared lens 10. Thermal expansion of the spacer 40 allows the first infrared lens 10 to move in the axial direction against the elastic force of the O-ring 60. When the spacer 40 is shrunken, the elastic force of the O-ring 60 allows the first infrared lens 10 to move in the opposite direction.Type: ApplicationFiled: November 26, 2009Publication date: January 26, 2012Inventors: Kanji Teraoka, Akihito Fujii, Tatsuya Izumi
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Patent number: 8097550Abstract: A low-cost spinel sintered body having small polarization and high heat-conductivity is provided. Also, a useful light-transmitting window and light-transmitting lens for light-emitting device is provided. For such purpose, the spinel sintered body of the present invention has a contrast ratio of 300 or more in the case of white light, where the contrast ratio is defined as the quotient obtained by dividing an amount of transmitting light in the case of being arranged between two polarizing plates, the polarizing directions of the two polarizing plates being parallel to each other, by an amount of transmitting light in the case of being arranged between two polarizing plates, the polarizing directions of the two polarizing plates being orthogonal to each other.Type: GrantFiled: May 7, 2010Date of Patent: January 17, 2012Assignee: Sumitomo Electric Industries, Ltd.Inventors: Akira Sasame, Ken-ichiro Shibata, Akihito Fujii, Shigeru Nakayama
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Publication number: 20100252950Abstract: There is provided a method of producing a polycrystalline transparent ceramic substrate used in a transparent substrate or the like for a liquid crystal projector. The method of producing a polycrystalline transparent ceramic substrate is characterized in comprising a step for sintering a ceramic body molded into a predetermined shape and producing a polycrystalline transparent ceramic sintered body, a step for cutting the polycrystalline transparent ceramic sintered body and producing a plurality of polycrystalline transparent ceramic cut bodies, a step for polishing the cut surfaces of the polycrystalline transparent ceramic cut bodies and producing polycrystalline transparent ceramic polished bodies, and a step for applying an antireflection coating to the polycrystalline transparent ceramic polished bodies and producing coated polycrystalline transparent ceramic bodies.Type: ApplicationFiled: November 21, 2008Publication date: October 7, 2010Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Masashi Yoshimura, Akihito Fujii, Shigeru Nakayama
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Publication number: 20100247812Abstract: There is provided a transparent polycrystalline spinel substrate characterized in having a transmittance of 0.005% or less in a crossed Nicol system at a thickness of 1 mm and a wavelength of 450 nm, which does not generate image blurring or light-dark change when used in optical products. There is also provided a method for producing the transparent polycrystalline spinel substrate comprising a step for preparing a spinel powder, a step for molding the spinel powder and producing a spinel formed body, a step for sintering the spinel formed body and producing a spinel sintered body, and a step for subjecting the spinel sintered body to hot isostatic pressing (HIP) and producing a spinel polycrystalline body. There is further provided a liquid crystal projector and a receiver for rear-projection television having the aforementioned transparent polycrystalline spinel substrate.Type: ApplicationFiled: November 21, 2008Publication date: September 30, 2010Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Masashi Yoshimura, Takenori Yoshikane, Akihito Fujii, Shigeru Nakayama
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Publication number: 20100220393Abstract: A low-cost spinel sintered body having small polarization and high heat-conductivity is provided. Also, a useful light-transmitting window and light-transmitting lens for light-emitting device is provided. For such purpose, the spinel sintered body of the present invention has a contrast ratio of 300 or more in the case of white light, where the contrast ratio is defined as the quotient obtained by dividing an amount of transmitting light in the case of being arranged between two polarizing plates, the polarizing directions of the two polarizing plates being parallel to each other, by an amount of transmitting light in the case of being arranged between two polarizing plates, the polarizing directions of the two polarizing plates being orthogonal to each other.Type: ApplicationFiled: May 7, 2010Publication date: September 2, 2010Applicant: Sumitomo Electric Industries, Ltd.Inventors: Akira Sasame, Ken-ichiro Shibata, Akihito Fujii, Shigeru Nakayama
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Patent number: 7741238Abstract: A low-cost spinel sintered body having small polarization and high heat-conductivity is provided. Also, a useful light-transmitting window and light-transmitting lens for light-emitting device is provided. For such purpose, the spinel sintered body of the present invention has a contrast ratio of 300 or more in the case of white light, where the contrast ratio is defined as the quotient obtained by dividing an amount of transmitting light in the case of being arranged between two polarizing plates, the polarizing directions of the two polarizing plates being parallel to each other, by an amount of transmitting light in the case of being arranged between two polarizing plates, the polarizing directions of the two polarizing plates being orthogonal to each other.Type: GrantFiled: March 28, 2006Date of Patent: June 22, 2010Assignee: Sumitomo Electric Industries, Ltd.Inventors: Akira Sasame, Ken-Ichiro Shibata, Akihito Fujii, Shigeru Nakayama
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SPINEL SINTERED BODY, PRODUCTION METHOD THEREOF, TRANSPARENT SUBSTRATE, AND LIQUID CRYSTAL PROJECTOR
Publication number: 20100103356Abstract: A spinel sintered body has a composition of MgO·nAl2O3 (1.05?n?1.30) containing 20 ppm or less of Si element. A production method thereof includes the steps of: forming a compacted body from a spinel powder containing 50 ppm or less of Si element and having a purity of not less than 99.5 mass %; a first sintering step of forming a sintered body having a density of not less than 95% by sintering the compacted body at 1500° C. to 1700° C. in a vacuum; and a second sintering step of subjecting the sintered body to pressurized sintering at 1600° C. to 1800° C.Type: ApplicationFiled: February 28, 2008Publication date: April 29, 2010Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Masashi Yoshimura, Takenori Yoshikane, Shigeru Nakayama, Akihito Fujii -
Publication number: 20090324912Abstract: A lower periphery constraint portion [[(15)]] and an upper periphery constraint portion [[(16)]] for molding the periphery of a lens as well as a mirror-finished optical molding surface [[(3a)]] and another mirror-finished optical molding surface [[(9a)]] are formed on a lower mold body [[(3)]] and an upper mold body [[(9)]] of a mold [[(1)]] respectively. The upper periphery constraint portion [[(16)]] and the lower periphery constraint portion [[(15)]] are so formed as to have prescribed thicknesses ?1 and ?2 in a pressure axis direction respectively. A periphery nonconstraint portion [[(17)]] not constraining ceramics when molding a ceramics material is provided between the lower mold body [[(3)]] and the upper mold body [[(9)]]. Thus, a ceramics molded component or the like is prevented from breakage and can be easily detached from the mold, so that the same can be more homogeneously densified.Type: ApplicationFiled: June 28, 2007Publication date: December 31, 2009Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI HYBRID PRODUCTS, INC.Inventors: Masato Hasegawa, Akihito Fujii
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Patent number: 7514452Abstract: The present invention provides 2-furancarboxylic acid hydrazide compounds represented by General Formula (I) below, and prodrugs, physiologically acceptable salts, hydrates, solvates thereof: wherein A is a group represented by Formula (a) or the like: (wherein either R4 or R5 represents cyano, nitro or the like, and the other represents a hydrogen atom or the like); either R1 or R2 represents a group: -D-(X)m-R6 or the like, and the other represents a group: -E-(Y)n-R7, hydrogen atom, aryl or the like; R3 is a hydrogen atom or the like; D and E independently represent aryl; X and Y independently represent O or the like; R6 and R7 independently represent alkyl, aryl, arylalkyl or the like; and m and n are independently 0 or 1, provided that the aryl is optionally substituted.Type: GrantFiled: January 30, 2003Date of Patent: April 7, 2009Assignee: Dainippon Pharmaceutical Co., LtdInventors: Akihito Fujii, Toshiyuki Negoro, Chiaki Migihashi, Makoto Murata, Keiji Nakamura, Takashi Nukuda, Takafumi Matsumoto, Kiyomi Imano
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Publication number: 20090067077Abstract: A low-cost spinel sintered body having small polarization and high heat-conductivity is provided. Also, a useful light-transmitting window and light-transmitting lens for light-emitting device is provided. For such purpose, the spinel sintered body of the present invention has a contrast ratio of 300 or more in the case of white light, where the contrast ratio is defined as the quotient obtained by dividing an amount of transmitting light in the case of being arranged between two polarizing plates, the polarizing directions of the two polarizing plates being parallel to each other, by an amount of transmitting light in the case of being arranged between two polarizing plates, the polarizing directions of the two polarizing plates being orthogonal to each other.Type: ApplicationFiled: March 28, 2006Publication date: March 12, 2009Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Akira Sasame, Ken-ichiro Shibata, Akihito Fujii, Shigeru Nakayama
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Publication number: 20090029071Abstract: A transparent substrate for an optical engine of a rear-projection television receiver or a liquid crystal image projector, in particular, for protecting an original image forming panel of the optical engine, the transparent substrate characterized by being formed from a transparent highly-thermal-conductive cubic polycrystal plate, exhibiting good transmission of light or the like, good thermal conductivity, and good operability, and a rear-projection television receiver including the transparent substrate. It is favorable that the transparent substrate formed from the transparent highly-thermal-conductive cubic polycrystal and provided with a coating layer on a surface is used. Preferably, the coating layer is a multilayer. It is favorable that the material for the coating is at least two types selected from metal fluorides, metal oxides, and zinc compounds. The optical transparency is improved and the environmental stability is also improved by the coating.Type: ApplicationFiled: December 13, 2006Publication date: January 29, 2009Applicant: SEI Hybrid Products, IncInventors: Shigeru Nakayama, Akihito Fujii, Shigenori Kinoshita
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Patent number: 7115412Abstract: Disclosed are a process for preparation of an optically active 7-substituted 3-(2-aminopropyl)indole compound and an intermediate therefor. In the above preparation process, 7-substituted indole is reacted with L- or DL-serine in the presence of a tryptophan-synthesizing enzyme originating in microorganisms to form corresponding 7-substituted L-tryptophan, and it is subjected, if necessary, to reduction, protection, exchange and elimination.Type: GrantFiled: March 30, 2001Date of Patent: October 3, 2006Assignees: Mercian Corporation, Dainippon Pharmaceutical Co., Ltd.Inventors: Takao Narita, Kunihiro Toyoda, Yoichiro Hirose, Toshio Tsuchida, Shiro Kato, Hiroshi Harada, Akihito Fujii
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Publication number: 20050171196Abstract: The present invention provides 2-furancarboxylic acid hydrazide compounds represented by General Formula (I) below, and prodrugs, physiologically acceptable salts, hydrates, solvates thereof, methods for producing them and pharmaceutical compositions containing them: wherein A is a group represented by Formula (a) or the like: (wherein either R4 or R5 represents cyano, nitro or the like, and the other represents a hydrogen atom or the like); either R1 or R2 represents a group: -D-(X)m-R6 or the like, and the other represents a group: -E-(Y)n-R7, hydrogen atom, aryl or the like; R3 is a hydrogen atom or the like; D and E independently represent aryl; X and Y independently represent O or the like; R6 and R7 independently represent alkyl, aryl, arylalkyl or the like; and m and n are independently 0 or 1, provided that the aryl is optionally substituted.Type: ApplicationFiled: January 30, 2003Publication date: August 4, 2005Inventors: Akihito Fujii, Toshiyuki Negoro, Chiaki Migihashi, Makoto Murata, Keiji Nakamura, Takashi Nukuda, Takafumi Matsumoto, Kiyomi Imano
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Publication number: 20030181732Abstract: Disclosed are a process for preparation of an optically active 7-substituted 3-(2-aminopropyl)indole compound and an intermediate therefor. In the above preparation process, 7-substituted indole is reacted with L- or DL-serine in the presence of a tryptophan-synthesizing enzyme originating in microorganisms to form corresponding 7-substituted L-tryptophan, and it is subjected, if necessary, to reduction, protection, exchange and elimination.Type: ApplicationFiled: December 6, 2002Publication date: September 25, 2003Inventors: Takao Narita, Kunihiro Toyoda, Yoichiro Hirose, Toshio Tsuchida, Shiro Kato, Hiroshi Harada, Akihito Fujii
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Patent number: 6458824Abstract: The present invention provides a solid preparation comprising a crystal of [3-[(2R)-[[(2R)-(3-chlorophenyl)-2-hydroxyethyl]amino]propyl]-1H-indol-7-yloxy]acetic acid (Compound A), especially a crystal of Compound A having a particle size of not larger than 100 &mgr;m at the cumulative weight distribution value of 50%, and not larger than 200 &mgr;m at the cumulative weight distribution value of 95%, preferably a solid preparation having the excellent stability and the content uniformity of Compound A, which is prepared by preparing granules of the crystal of Compound A with fillers, disintegrants and binders, and then followed by mixing said granules with external excipients.Type: GrantFiled: September 14, 2000Date of Patent: October 1, 2002Assignee: Dainippon Pharmaceutical Co., Ltd.Inventors: Motokazu Iwata, Teruaki Kuriyama, Megumi Fujita, Keiichi Fujiwara, Shiro Kato, Hiroshi Harada, Akihito Fujii, Osamu Odai, Hitoshi Kawashima