Patents by Inventor Kohei Oka
Kohei Oka 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: 10428894Abstract: Provided is a resin-made impact absorption member including: an impact absorption portion which includes a fiber-reinforced resin material containing reinforcing fibers and a thermoplastic resin and has a hollow structure including an outer cylindrical portion and a hollow portion, in which the reinforcing fiber has an average fiber length of 1 mm to 100 mm, the thermoplastic resin has a fracture elongation of 10% or more, the fiber-reinforced resin material has a compressive elastic modulus of 10 GPa or more and a compressive strength of 150 MPa to 500 MPa, and in the impact absorption portion, a maximum value of a ratio L1/t1 of a distance L1 from a position of the center of gravity to the outer cylindrical portion on a same section in a sectional shape in a direction orthogonal to an impact absorption direction, to a thickness t1 of the outer cylindrical portion, is 40 or less.Type: GrantFiled: February 5, 2015Date of Patent: October 1, 2019Assignee: Teijin LimitedInventors: Shuhei Onoue, Tadashi Yamaji, Keizo Yokoyama, Kohei Oka
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Patent number: 10257087Abstract: Provided is a communication device in which communication between hosts of a layer 2 network is overlaid on a layer 3 network. The communication device manages a first MTU length of each communication path with respect to a plurality of communication paths in the layer 3 network, determines a second MTU length based on information to be added in cases where communication between the hosts of the layer 2 network is overlaid via the plurality of communication paths, and notifies the hosts of the second MTU length.Type: GrantFiled: April 24, 2017Date of Patent: April 9, 2019Assignee: Alaxala Networks CorporationInventors: Yasunori Yamamoto, Motohide Noumi, Kohei Oka
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Publication number: 20170339055Abstract: Provided is a communication device in which communication between hosts of a layer 2 network is overlaid on a layer 3 network. The communication device manages a first MTU length of each communication path with respect to a plurality of communication paths in the layer 3 network, determines a second MTU length based on information to be added in cases where communication between the hosts of the layer 2 network is overlaid via the plurality of communication paths, and notifies the hosts of the second MTU length.Type: ApplicationFiled: April 24, 2017Publication date: November 23, 2017Inventors: Yasunori YAMAMOTO, Motohide NOUMI, Kohei OKA
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Publication number: 20160356334Abstract: Provided is a resin-made impact absorption member including: an impact absorption portion which includes a fiber-reinforced resin material containing reinforcing fibers and a thermoplastic resin and has a hollow structure including an outer cylindrical portion and a hollow portion, in which the reinforcing fiber has an average fiber length of 1 mm to 100 mm, the thermoplastic resin has a fracture elongation of 10% or more, the fiber-reinforced resin material has a compressive elastic modulus of 10 GPa or more and a compressive strength of 150 MPa to 500 MPa, and in the impact absorption portion, a maximum value of a ratio L1/t1 of a distance L1 from a position of the center of gravity to the outer cylindrical portion on a same section in a sectional shape in a direction orthogonal to an impact absorption direction, to a thickness t1 of the outer cylindrical portion, is 40 or less.Type: ApplicationFiled: February 5, 2015Publication date: December 8, 2016Applicant: Teijin LimitedInventors: Shuhei ONOUE, Tadashi YAMAJI, Keizo YOKOYAMA, Kohei OKA
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Patent number: 8431525Abstract: There has been a need for coelenteramide analogs or the like that produce fluorescent proteins which exhibit different fluorescent characteristics from those of the existing fluorescent proteins. Disclosed is a compound represented by general formula (1) (wherein R1 represents a substituted or unsubstituted aryl, a substituted or unsubstituted arylalkyl, a straight or branched alkyl which may optionally be substituted with an alicyclic group, an alicyclic group or a heterocyclic group; R2 represents hydrogen or —(SO2)R4; R3 represents hydrogen, hydroxyl, methoxy or acetoxy; R4 represents a substituted or unsubstituted aryl, a substituted or unsubstituted arylalkyl or a straight or branched alkyl which may optionally be substituted with an alicyclic group; and X1 represents —C(?S)— or —SO2—).Type: GrantFiled: February 8, 2010Date of Patent: April 30, 2013Assignees: JNC Corporation, Tokyo Institute of TechnologyInventors: Takamitsu Hosoya, Kohei Oka, Satoshi Inouye
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Patent number: 8235735Abstract: A terminal joining structure includes a terminal having a tubular barrel portion and a flange portion that is integrally formed at the axis-direction end of the barrel portion, a conductor substrate on which is opened a through-hole for inserting the barrel portion, and a ring that fits on the barrel portion on the opposite side of the conductor substrate. On the barrel portion is formed a taper that increases in diameter toward the flange portion. The diameter of the larger-diameter portion of the taper is larger than the inner diameter of the through-hole. The terminal is caulked to cause radially outward expansion of an end part of the barrel portion, which passes through the ring, on the opposite side of the conductor substrate and is fixed to the conductor substrate together with the ring.Type: GrantFiled: January 30, 2008Date of Patent: August 7, 2012Assignees: Mitsubishi Electric Corporation, Ryoden Kasei Co., Ltd.Inventors: Kohei Oka, Shozo Sakaue, Shunichi Kitayama, Yoichi Hisamori, Yoshitaka Ono, Toshikazu Karita, Tetsuya Takahashi
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Publication number: 20110288280Abstract: There has been a need for coelenteramide analogs or the like that produce fluorescent proteins which exhibit different fluorescent characteristics from those of the existing fluorescent proteins. Disclosed is a compound represented by general formula (1) (wherein R1 represents a substituted or unsubstituted aryl, a substituted or unsubstituted arylalkyl, a straight or branched alkyl which may optionally be substituted with an alicyclic group, an alicyclic group or a heterocyclic group; R2 represents hydrogen or —(SO2)R4; R3 represents hydrogen, hydroxyl, methoxy or acetoxy; R4 represents a substituted or unsubstituted aryl, a substituted or unsubstituted arylalkyl or a straight or branched alkyl which may optionally be substituted with an alicyclic group; and X1 represents —C(?S)— or —SO2—).Type: ApplicationFiled: February 8, 2010Publication date: November 24, 2011Applicants: TOKYO INSTITUTE OF TECHNOLOGY, JNC CORPORATIONInventors: Takamitsu Hosoya, Kohei Oka, Satoshi Inouye
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Publication number: 20110003519Abstract: A terminal joining structure includes a terminal having a tubular barrel portion and a flange portion that is integrally formed at the axis-direction end of the barrel portion, a conductor substrate on which is opened a through-hole for inserting the barrel portion, and a ring that fits on the barrel portion on the opposite side of the conductor substrate. On the barrel portion is formed a taper that increases in diameter toward the flange portion. The diameter of the larger-diameter portion of the taper is larger than the inner diameter of the through-hole. The terminal is caulked to cause radially outward expansion of an end part of the barrel portion, which passes through the ring, on the opposite side of the conductor substrate and is fixed to the conductor substrate together with the ring.Type: ApplicationFiled: January 30, 2008Publication date: January 6, 2011Applicants: Mitsubishi Electric Corporation, Ryoden Kasei Co., Ltd.Inventors: Kohei Oka, Shozo Sakaue, Shunichi Kitayama, Yoichi Hisamori, Yoshitaka Ono, Toshikazu Karita, Tetsuya Takahashi