Patents by Inventor Tomohiko Ueda

Tomohiko Ueda 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).

  • Patent number: 10859783
    Abstract: An optical fiber rack includes: a rack part on which a plurality of termination units arranged along an up-down direction are located; an optical fiber housing part which has a back plate and in which an extra length wiring part in a plurality of optical fiber bundles connected to each of the plurality of termination units is housed; and a plurality of first dividing bodies for dividing locations of the optical fiber bundles in the optical fiber housing part, the plurality of first dividing bodies being attached to the back plate so as to be arranged along the up-down direction in the optical fiber housing part. The first dividing body has a holding part for holding the corresponding optical fiber bundle, and the holding part of the first dividing body provided lower in the up-down direction is positioned to be separated from the back plate.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: December 8, 2020
    Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., JAPAN COMMUNICATION ACCESSORIES MANUFACTURING CO., LTD., SEI OPTIFRONTIER CO., LTD.
    Inventors: Takayasu Yamauchi, Tomohiko Ueda, Tsuneari Ito, Takayuki Yokochi, Kazuya Masuda
  • Patent number: 10641979
    Abstract: An optical fiber rack includes a rack part on which a plurality of termination units arranged in a vertical direction are located, a first optical fiber housing part in which extra length wiring parts of a plurality of first optical fibers connected with each of the plurality of termination units are housed, a second optical fiber housing part in which an extra length wiring part of a second optical fiber connected with any of the termination units is housed, and a partition plate partitioning the first optical fiber housing part from the second optical fiber housing part.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: May 5, 2020
    Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., Japan Communication Accessories Manufacturing Co., Ltd., SUMITOMO ELECTIC LIGHTWAVE CORP.
    Inventors: Takayasu Yamauchi, Tomohiko Ueda, Takayuki Yokochi, Takashi Kondo
  • Patent number: 10591693
    Abstract: A termination unit located on a rack part of an optical fiber rack includes a housing a plurality of first optical fibers located in the housing, the plurality of first optical fibers being fusion spliced to a multi fiber cable introduced from an outside of the optical fiber rack, an adapter group including a plurality of adapters in a line in the housing, the plurality of adapters being respectively connected to the plurality of first optical fibers on an inside of the housing and being respectively connected to a plurality of second optical fibers on an outside of the housing, and an optical fiber passing part through which at least one optical fiber is configured to pass, the optical fiber passing part being located in at least one of: the adapter group, and between the housing and the adapter group in an arrangement direction.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: March 17, 2020
    Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI Optifrontier Co., Ltd.
    Inventors: Takayasu Yamauchi, Tomohiko Ueda, Junji Fukui, Yukihiro Yokomachi, Tomoyuki Yokokawa, Takayuki Yokochi, Masanori Yamanaka
  • Patent number: 10523317
    Abstract: A measurement system is a measurement system inspecting an optical transmission line configured by connecting a plurality of optical cables, each of which includes a plurality of optical fibers, wherein the optical transmission line includes a plurality of optical fiber lines configured by connecting the plurality of optical fibers in the plurality of optical cables, the measurement system including: a first measurement device configured to be disposed at a first end of the optical transmission line; and a second measurement device configured to be disposed at a second end of the optical transmission line, wherein the first measurement device and the second measurement device perform a first measurement to inspect whether the optical cable is misconnected, and a second measurement to inspect the plurality of optical fiber lines in a case where it is determined that there is no misconnection in the first measurement.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: December 31, 2019
    Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI Optifrontier Co., Ltd., SUMITOMO ELECTRIC LIGHTWAVE CORP.
    Inventors: Kazuya Masuda, Tomohiko Ueda, Tsuneari Ito, Kenichiro Otsuka, Yoshifumi Hishikawa, Gouichi Fukumoto, Tetsufumi Tsuzaki, Toshiyuki Miyamoto, Takashi Murakami, Yoshiyuki Suetsugu, Takashi Kondo
  • Publication number: 20190372665
    Abstract: A measurement system is a measurement system inspecting an optical transmission line configured by connecting a plurality of optical cables, each of which includes a plurality of optical fibers, wherein the optical transmission line includes a plurality of optical fiber lines configured by connecting the plurality of optical fibers in the plurality of optical cables, the measurement system including: a first measurement device configured to be disposed at a first end of the optical transmission line; and a second measurement device configured to be disposed at a second end of the optical transmission line, wherein the first measurement device and the second measurement device perform a first measurement to inspect whether the optical cable is misconnected, and a second measurement to inspect the plurality of optical fiber lines in a case where it is determined that there is no misconnection in the first measurement.
    Type: Application
    Filed: June 5, 2018
    Publication date: December 5, 2019
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI Optifrontier Co., Ltd., SUMITOMO ELECTRIC LIGHTWAVE CORP.
    Inventors: Kazuya MASUDA, Tomohiko UEDA, Tsuneari ITO, Kenichiro OTSUKA, Yoshifumi HISHIKAWA, Gouichi FUKUMOTO, Tetsufumi TSUZAKI, Toshiyuki MIYAMOTO, Takashi MURAKAMI, Yoshiyuki SUETSUGU, Takashi KONDO
  • Patent number: 10481358
    Abstract: A termination unit to be located on a rack part of an optical fiber rack includes a housing, a plurality of first optical fibers located in the housing and fusion spliced to a multi fiber cable introduced from an outside of the optical fiber rack, a plurality of external connection adapters located in a line in a first direction, and in which the plurality of first optical fibers are respectively connected to the plurality of external connection adaptors on an inside of the housing, a guide part located on one side surface of the housing crossing the first direction, and extending in a second direction crossing the first direction, and a fixing member attached to the one side surface of the housing, and to which the multi fiber cable is fixed. The fixing member is movably attached along the guide part.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: November 19, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Takayasu Yamauchi, Tomohiko Ueda, Takayuki Yokochi, Masanori Yamanaka
  • Publication number: 20190346645
    Abstract: An optical fiber rack includes: a rack part on which a plurality of termination units arranged along an up-down direction are located; an optical fiber housing part which has a back plate and in which an extra length wiring part in a plurality of optical fiber bundles connected to each of the plurality of termination units is housed; and a plurality of first dividing bodies for dividing locations of the optical fiber bundles in the optical fiber housing part, the plurality of first dividing bodies being attached to the back plate so as to be arranged along the up-down direction in the optical fiber housing part. The first dividing body has a holding part for holding the corresponding optical fiber bundle, and the holding part of the first dividing body provided lower in the up-down direction is positioned to be separated from the back plate.
    Type: Application
    Filed: November 27, 2017
    Publication date: November 14, 2019
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., Japan Communication Accessories Manufacturing Co., Ltd., SEI Optifrontier Co., Ltd.
    Inventors: Takayasu YAMAUCHI, Tomohiko UEDA, Tsuneari ITO, Takayuki YOKOCHI, Kazuya MASUDA
  • Publication number: 20190305124
    Abstract: A semiconductor device includes an n-type first drift layer, an i-type or an n-type withstand voltage layer disposed on top of the first drift layer, a p-type body layer disposed on top of the withstand voltage layer, an n-type second drift layer that is disposed on top of the first drift layer, is in contact with side surfaces of the withstand voltage layer and the body layer, an n-type source layer that is disposed on top of the body layer, is separated from the first drift layer, the second drift layer, and the withstand voltage layer by the body layer, and a gate electrode that faces the body layer through a gate insulating film, the body layer being positioned between the second drift layer and the source layer. The withstand voltage layer is made from a material having a bandgap larger than that of the first drift layer.
    Type: Application
    Filed: March 11, 2019
    Publication date: October 3, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi WATANABE, Hiroyuki UEDA, Tomohiko MORI
  • Publication number: 20190250351
    Abstract: An optical fiber rack includes a rack part on which a plurality of termination units arranged in a vertical direction are located, a first optical fiber housing part in which extra length wiring parts of a plurality of first optical fibers connected with each of the plurality of termination units are housed, a second optical fiber housing part in which an extra length wiring part of a second optical fiber connected with any of the termination units is housed, and a partition plate partitioning the first optical fiber housing part from the second optical fiber housing part.
    Type: Application
    Filed: February 12, 2018
    Publication date: August 15, 2019
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., Japan Communication Accessories Manufacturing Co., Ltd., SUMITOMO ELECTRIC LIGHTWAVE CORP.
    Inventors: Takayasu YAMAUCHI, Tomohiko UEDA, Takayuki YOKOCHI, Takashi KONDO
  • Patent number: 10326012
    Abstract: A semiconductor device includes a semiconductor substrate, a source electrode, a drain electrode, and a gate electrode disposed on the semiconductor substrate via a gate insulator film. The semiconductor substrate includes a first portion constituted of GaN and a second portion constituted of AlxGa(1-x)N (0<x?1). The first portion includes an n-type source region being in contact with the source electrode, an n-type drain region being in contact with the drain electrode, a p-type body region intervening between the source region and the drain region and being in contact with the source electrode, and an n-type drift region intervening between the body region and the drain region and having a carrier density that is lower than a carrier density of the drain region. The second portion includes a barrier region being in contact with each of the source electrode, the body region and the drift region.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: June 18, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Watanabe, Hiroyuki Ueda, Tomohiko Mori
  • Patent number: 10312362
    Abstract: A switching element includes a semiconductor substrate that includes a first n-type semiconductor layer, a p-type body layer constituted by an epitaxial layer, and a second n-type semiconductor layer separated from the first n-type semiconductor layer by the body layer, a gate insulating film that covers a range across the surface of the first n-type semiconductor layer, the surface of the body layer, and the surface of the second n-type semiconductor layer, and a gate electrode that faces the body layer through the gate insulating film. An interface between the first n-type semiconductor layer and the body layer includes an inclined surface. The inclined surface is inclined such that the depth of the body layer increases as a distance from an end of the body layer increases in a horizontal direction. The inclined surface is disposed below the gate electrode.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: June 4, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya Yamada, Takashi Okawa, Tomohiko Mori, Hiroyuki Ueda
  • Publication number: 20190079249
    Abstract: An optical connector according to one embodiment includes a plurality of optical connector plugs collectively connected to a plurality of adapters in a connection direction, each optical connector plug including a ferrule holding an optical fiber, contacting portions located on the opposite side to the adapter with respect to a ferrule end face of the ferrule and coming into contact with each adapter, wherein distances from the ferrule end face to the contacting portions are longer than distances from the ferrule end face to the contacting portions, respectively, determined by optical connector international standards.
    Type: Application
    Filed: September 11, 2018
    Publication date: March 14, 2019
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI Optifrontier Co., Ltd.
    Inventors: Yoshikyo TAMEKUNI, Kazuya MASUDA, Tomohiko UEDA, Yuji SUZUKI
  • Publication number: 20190064468
    Abstract: A termination unit located on a rack part of an optical fiber rack includes a housing a plurality of first optical fibers located in the housing, the plurality of first optical fibers being fusion spliced to a multi fiber cable introduced from an outside of the optical fiber rack, an adapter group including a plurality of adapters in a line in the housing, the plurality of adapters being respectively connected to the plurality of first optical fibers on an inside of the housing and being respectively connected to a plurality of second optical fibers on an outside of the housing, and an optical fiber passing part through which at least one optical fiber is configured to pass, the optical fiber passing part being located in at least one of: the adapter group, and between the housing and the adapter group in an arrangement direction.
    Type: Application
    Filed: August 22, 2018
    Publication date: February 28, 2019
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI Optifrontier Co., Ltd.
    Inventors: Takayasu YAMAUCHI, Tomohiko UEDA, Junji FUKUI, Yukihiro YOKOMACHI, Tomoyuki YOKOKAWA, Takayuki YOKOCHI, Masanori YAMANAKA
  • Publication number: 20190064465
    Abstract: A termination unit to be located on a rack part of an optical fiber rack includes a housing, a plurality of first optical fibers located in the housing and fusion spliced to a multi fiber cable introduced from an outside of the optical fiber rack, a plurality of external connection adapters located in a line in a first direction, and in which the plurality of first optical fibers are respectively connected to the plurality of external connection adaptors on an inside of the housing, a guide part located on one side surface of the housing crossing the first direction, and extending in a second direction crossing the first direction, and a fixing member attached to the one side surface of the housing, and to which the multi fiber cable is fixed. The fixing member is movably attached along the guide part.
    Type: Application
    Filed: August 21, 2018
    Publication date: February 28, 2019
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Takayasu YAMAUCHI, Tomohiko UEDA, Takayuki YOKOCHI, Masanori YAMANAKA
  • Publication number: 20180348444
    Abstract: The optical connector according to one embodiment includes a plurality of optical connector plugs collectively connected to a plurality of adapters in a connection direction, wherein each of the optical connector plugs includes a tubular ferrule which holds an optical fiber, and a diameter of the ferrule is smaller than that of a ferrule defined by the international standard of the optical connector.
    Type: Application
    Filed: May 29, 2018
    Publication date: December 6, 2018
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI Optifrontier Co., Ltd.
    Inventors: Yoshikyo Tamekuni, Kazuya Masuda, Tomohiko Ueda, Yuji Suzuki
  • Patent number: 7606453
    Abstract: Tensile strength of a tape layer in the lengthwise direction is selected to be higher than adhesive force of the tape layer to optical fiber cores. Further, position limiting portions 111 by which the positions of a plurality of optical fibers 120 can be limited are formed in a flexible film 110 for tape core assembly which film is used for integrating the plurality of optical fibers 120 as a tape. Further, a ribbon-like optical fiber core assembly 301 according to the invention including a plurality of optical fiber cores 302 arranged planarly at designated intervals, an adhesive layer 305 disposed so as to surround the optical fiber cores 302, and films 304a and 304b integrated with the optical fiber cores 302 by the adhesive layer 305.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: October 20, 2009
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kousuke Tanaka, Toshifumi Hosoya, Tsuyoshi Ikada, Kazuhiro Sato, Hiroyasu Sugiyama, Toshiaki Kakii, Tomohiko Ueda
  • Patent number: 7512307
    Abstract: An optical connector ferrule molding die 1 for molding an optical connector ferrule having a plurality of optical fiber holes comprises an upper die 10, a lower die 11, and an intermediate die 12, whereas the intermediate die 12 comprises a plurality of optical fiber hole forming pins 126 for forming optical fiber holes. The lower die 11 is provided with a protrusion 114 for forming a window hole of the optical connector ferrule, whereas the optical fiber hole forming pins 126 projecting from the intermediate die 12 are secured by through holes 115 penetrating through the protrusion 114 and V-grooves 113.
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: March 31, 2009
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Wataru Sakurai, Hiroshi Katsura, Toshiaki Kakii, Kei Sunaga, Tomohiko Ueda, Toshifumi Hosoya, Daizo Nishioka, Kenichiro Ohtsuka, Yuko Masunaga
  • Patent number: 7410303
    Abstract: An optical connector ferrule molding die 1 for molding an optical connector ferrule having a plurality of optical fiber holes comprises an upper die 10, a lower die 11, and an intermediate die 12, whereas the intermediate die 12 comprises a plurality of optical fiber hole forming pins 126 for forming optical fiber holes. The lower die 11 is provided with a protrusion 114 for forming a window hole of the optical connector ferrule, whereas the optical fiber hole forming pins 126 projecting from the intermediate die 12 are secured by through holes 115 penetrating through the protrusion 114 and V-grooves 113.
    Type: Grant
    Filed: November 29, 2002
    Date of Patent: August 12, 2008
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Wataru Sakurai, Hiroshi Katsura, Toshiaki Kakii, Kei Sunaga, Tomohiko Ueda, Toshifumi Hosoya, Daizo Nishioka, Kenichiro Ohtsuka, Yuko Masunaga
  • Publication number: 20060263034
    Abstract: An optical connector ferrule molding die 1 for molding an optical connector ferrule having a plurality of optical fiber holes comprises an upper die 10, a lower die 11, and an intermediate die 12, whereas the intermediate die 12 comprises a plurality of optical fiber hole forming pins 126 for forming optical fiber holes. The lower die 11 is provided with a protrusion 114 for forming a window hole of the optical connector ferrule, whereas the optical fiber hole forming pins 126 projecting from the intermediate die 12 are secured by through holes 115 penetrating through the protrusion 114 and V-grooves 113.
    Type: Application
    Filed: July 31, 2006
    Publication date: November 23, 2006
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Wataru Sakurai, Hiroshi Katsura, Toshiaki Kakii, Kei Sunaga, Tomohiko Ueda, Toshifumi Hosoya, Daizo Nishioka, Kenichiro Ohtsuka, Yuko Masunaga
  • Patent number: 7052187
    Abstract: A pair of guide holes for guide pin insertion and one or a plurality of optical fiber positioning holes extending inwardly from the front end surface are formed in a connector ferrule of an optical connector. A chamfer is formed on the opening edge portion of the guide hole of the connector ferrule on the front end surface side thereof. The opening diameter R of the guide hole at the front end surface is preferably 1.0 to 1.5 mm when the front end surface is slant polished at an angle of 8 degrees. Furthermore, the chamfering angle ? of the chamfer is preferably 90 to 150 degrees. Moreover, the average particle size of the filler contained in the connector ferrule is no more than 20 ?m. As a result, the surface of the chamfer is comparatively smooth.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: May 30, 2006
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kenichiro Ohtsuka, Yoshikyo Tamekuni, Hiroshi Katsura, Tomohiko Ueda, Toshiaki Kakii