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).
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Patent number: 11965801Abstract: A measurement system includes a measurement device including a light source, and a first power meter, and one or a plurality of connection members each configured to optically connect a pair of optical fiber lines of the plurality of optical fiber lines. A first optical fiber line of the pair of optical fiber lines includes a first end and a second end, a second optical fiber line of the pair of optical fiber lines includes a third end and a fourth end, the one or plurality of connection members optically connect the second end to the fourth end, the light source causes testing light to be incident on the first end, and the first power meter measures first intensity of first output light output from the third end by causing the testing light to propagate through the pair of optical fiber lines.Type: GrantFiled: May 22, 2019Date of Patent: April 23, 2024Assignees: SUMITOMO ELECTRIC OPTIFRONTIER CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kazuya Masuda, Tomohiko Ueda, Kenichiro Otsuka, Tsuneari Ito, Tetsufumi Tsuzaki, Yoshifumi Hishikawa, Hitoshi Hatayama
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Patent number: 11953736Abstract: In a fiber connection structure with optical connectors according to one embodiment, among m first connector port groups, arrangement orders of colors of a plurality of the optical fibers in (2×j?1)th (j is a natural number satisfying 1?j and 2×j?m) first connector port groups are the same, and among the m first connector port groups, arrangement orders of the colors of the plurality of optical fibers in (2×j)th first connector port groups are the same. The arrangement order of the colors of the plurality of optical fibers in the (2×j)th first connector port group is a reverse order of the arrangement order of the colors of the plurality of optical fibers in the (2×j?1)th first connector port group.Type: GrantFiled: February 18, 2020Date of Patent: April 9, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC OPTIFRONTIER CO., LTD.Inventors: Kazuya Masuda, Takahiro Inaba, Tomohiko Ueda
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Publication number: 20230028161Abstract: In a fiber connection structure with optical connectors according to one embodiment, among m first connector port groups, arrangement orders of colors of a plurality of the optical fibers in (2×j?1)th (j is a natural number satisfying 1?j and 2×j?m) first connector port groups are the same, and among the m first connector port groups, arrangement orders of the colors of the plurality of optical fibers in (2×j)th first connector port groups are the same. The arrangement order of the colors of the plurality of optical fibers in the (2×j)th first connector port group is a reverse order of the arrangement order of the colors of the plurality of optical fibers in the (2×j?1)th first connector port group.Type: ApplicationFiled: February 18, 2020Publication date: January 26, 2023Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC OPTIFRONTIER CO., LTD.Inventors: Kazuya MASUDA, Takahiro INABA, Tomohiko UEDA
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Patent number: 11156787Abstract: An optical connector includes a holder configured to hold at least three or more optical connector plugs. The optical connector plugs and the adapters are arranged in an intersecting direction intersecting with a connecting direction. The optical connector plugs include a first optical connector plug and a second optical connector plug. Any of the first optical connector plug and the adapter to which the first optical connector plug is connected has a latch mechanism configured to engage the first optical connector plug with the adapter. Any of the second optical connector plug and the adapter to which the second optical connector plug is connected does not have a latch mechanism configured to engage the second optical connector plug with the adapter.Type: GrantFiled: May 23, 2018Date of Patent: October 26, 2021Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI Optifrontier Co., Ltd.Inventors: Yoshikyo Tamekuni, Kazuya Masuda, Tomohiko Ueda, Yuji Suzuki
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Publication number: 20210239569Abstract: A measurement system includes a measurement device including a light source, and a first power meter, and one or a plurality of connection members each configured to optically connect a pair of optical fiber lines of the plurality of optical fiber lines. A first optical fiber line of the pair of optical fiber lines includes a first end and a second end, a second optical fiber line of the pair of optical fiber lines includes a third end and a fourth end, the one or plurality of connection members optically connect the second end to the fourth end, the light source causes testing light to be incident on the first end, and the first power meter measures first intensity of first output light output from the third end by causing the testing light to propagate through the pair of optical fiber lines.Type: ApplicationFiled: May 22, 2019Publication date: August 5, 2021Applicants: SUMITOMO ELECTRIC OPTIFRONTIER CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kazuya MASUDA, Tomohiko UEDA, Kenichiro OTSUKA, Tsuneari ITO, Tetsufumi TSUZAKI, Yoshifumi HISHIKAWA, Hitoshi HATAYAMA
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Publication number: 20210116649Abstract: An optical connector includes a holder configured to hold at least three or more optical connector plugs. The optical connector plugs and the adapters are arranged in an intersecting direction intersecting with a connecting direction. The optical connector plugs include a first optical connector plug and a second optical connector plug. Any of the first optical connector plug and the adapter to which the first optical connector plug is connected has a latch mechanism configured to engage the first optical connector plug with the adapter. Any of the second optical connector plug and the adapter to which the second optical connector plug is connected does not have a latch mechanism configured to engage the second optical connector plug with the adapter.Type: ApplicationFiled: May 23, 2018Publication date: April 22, 2021Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI Optifrontier Co., Ltd.Inventors: Yoshikyo TAMEKUNI, Kazuya MASUDA, Tomohiko UEDA, Yuji SUZUKI
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Patent number: 10859783Abstract: 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: GrantFiled: November 27, 2017Date of Patent: December 8, 2020Assignees: 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
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Patent number: 10641979Abstract: 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: GrantFiled: February 12, 2018Date of Patent: May 5, 2020Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., Japan Communication Accessories Manufacturing Co., Ltd., SUMITOMO ELECTIC LIGHTWAVE CORP.Inventors: Takayasu Yamauchi, Tomohiko Ueda, Takayuki Yokochi, Takashi Kondo
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Patent number: 10591693Abstract: 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: GrantFiled: August 22, 2018Date of Patent: March 17, 2020Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI Optifrontier Co., Ltd.Inventors: Takayasu Yamauchi, Tomohiko Ueda, Junji Fukui, Yukihiro Yokomachi, Tomoyuki Yokokawa, Takayuki Yokochi, Masanori Yamanaka
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Patent number: 10523317Abstract: 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: GrantFiled: June 5, 2018Date of Patent: December 31, 2019Assignees: 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
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Publication number: 20190372665Abstract: 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: ApplicationFiled: June 5, 2018Publication date: December 5, 2019Applicants: 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
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Patent number: 10481358Abstract: 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: GrantFiled: August 21, 2018Date of Patent: November 19, 2019Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takayasu Yamauchi, Tomohiko Ueda, Takayuki Yokochi, Masanori Yamanaka
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Publication number: 20190346645Abstract: 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: ApplicationFiled: November 27, 2017Publication date: November 14, 2019Applicants: 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
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Publication number: 20190250351Abstract: 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: ApplicationFiled: February 12, 2018Publication date: August 15, 2019Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., Japan Communication Accessories Manufacturing Co., Ltd., SUMITOMO ELECTRIC LIGHTWAVE CORP.Inventors: Takayasu YAMAUCHI, Tomohiko UEDA, Takayuki YOKOCHI, Takashi KONDO
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Publication number: 20190079249Abstract: 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: ApplicationFiled: September 11, 2018Publication date: March 14, 2019Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI Optifrontier Co., Ltd.Inventors: Yoshikyo TAMEKUNI, Kazuya MASUDA, Tomohiko UEDA, Yuji SUZUKI
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Publication number: 20190064465Abstract: 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: ApplicationFiled: August 21, 2018Publication date: February 28, 2019Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takayasu YAMAUCHI, Tomohiko UEDA, Takayuki YOKOCHI, Masanori YAMANAKA
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Publication number: 20190064468Abstract: 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: ApplicationFiled: August 22, 2018Publication date: February 28, 2019Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI Optifrontier Co., Ltd.Inventors: Takayasu YAMAUCHI, Tomohiko UEDA, Junji FUKUI, Yukihiro YOKOMACHI, Tomoyuki YOKOKAWA, Takayuki YOKOCHI, Masanori YAMANAKA
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Publication number: 20180348444Abstract: 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: ApplicationFiled: May 29, 2018Publication date: December 6, 2018Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SEI Optifrontier Co., Ltd.Inventors: Yoshikyo Tamekuni, Kazuya Masuda, Tomohiko Ueda, Yuji Suzuki
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Patent number: 7606453Abstract: 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: GrantFiled: August 27, 2003Date of Patent: October 20, 2009Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kousuke Tanaka, Toshifumi Hosoya, Tsuyoshi Ikada, Kazuhiro Sato, Hiroyasu Sugiyama, Toshiaki Kakii, Tomohiko Ueda
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Patent number: 7512307Abstract: 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: GrantFiled: July 31, 2006Date of Patent: March 31, 2009Assignee: Sumitomo Electric Industries, Ltd.Inventors: Wataru Sakurai, Hiroshi Katsura, Toshiaki Kakii, Kei Sunaga, Tomohiko Ueda, Toshifumi Hosoya, Daizo Nishioka, Kenichiro Ohtsuka, Yuko Masunaga