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Historic Milestones

1897 Opened the Sumitomo Copper Rolling Works. (The formation of the Company)
1900 Started production of silicon copper wires and supplied the Japanese Ministry of Communications with them.
1908 Started production of power cables.
1909 Started test development of telecommunication cables.
1911 Established Sumitomo Electric Wire & Cable Works. (The foundation of the Company)
Manufactured and supplied the first Japan-made underground high-voltage (11,000 V) cables.
1916 Opened the Osaka Works.
Started production of enamel wires.
1920 Incorporated Sumitomo Electric Wire & Cable Works as a limited company. (The establishment of the Company)
1931 Started production of cemented carbide tools, "IGETALLOY™."
1932 Started production of special steel wires.
1939 Company name changed to Sumitomo Electric Industries, Ltd.
1941 Opened the Itami Works.
1943 Started production of rubber products.
1946 Opened a branch office in Tokyo (now the Tokyo Head Office).
1948 Started marketing sintered powder metal products.
1949 Entered into the business of construction of overhead transmission lines.
1957 Supplied NHK with the first Japan-made television broadcasting antennas.
1961 Opened the Yokohama Works.
Delivered the wiring harness for four-wheel vehicles for the first time in its history.
1962 Started production of electron beam irradiated tubes, "IRRAX TUBE™."
The Head Office was moved from Osaka's Konohana Ward to the present address in Chuo Ward.
1963 Started production of disc brakes.
1964 Started production of electron beam irradiated wires.
1968 Entered into the business of traffic control systems.
1969 Established its first overseas production facility (Siam Electric Industries Co., Ltd.)
Started production of flexible printed circuits (FPCs).
1970 Started production of compound semiconductors.
1971 Opened the Kanto Works.
1974 Started production of optical fiber cables.
1976 Received an order for a large telecommunications network project in Nigeria.
1978 Delivered and put into operation the world's first bi-directional fiber optic CATV system "Hi-OVIS."
1981 Delivered the fiber optic LAN system for the first time in its history.
1982 Succeeded in producing the world's-largest-class synthetic monocrystal diamonds (1.2 carats).
1985 Sumitomo Electric's keyboard performer robot and electrical system of linear induction motor train won popularity in EXPO '85.
1996 Developed a technology for producing long-length oxide high-temperature superconducting wires.
1997 The 100th anniversary of Sumitomo Electric Industries, Ltd.
1998 Developed and started marketing eco-friendly wires and cables.
1999 Sumitomo Electric Fine Polymer, Inc. (fine polymer products) started operation.
2001 J-Power Systems Corporation (high-voltage power cables) started operation.
2002 Sumitomo Electric Networks, Inc. (network equipment) started operation.
Sumitomo (SEI) Steel Wire, Corp. (special metal wires) started operation.
Sumitomo Electric Wintec, Inc. (magnet wires) started operation.
2003 Sumiden Hitachi Cable Ltd. (wires and cables for buildings and industrial equipment) started operation.
Sumitomo Electric Hardmetal Corp. (powder alloy and diamond products) started operation.
2004 Eudina Devices Inc. (semiconductor devices) started operation.
A.L.M.T. Corp. was made a wholly-owned subsidiary.
Won contract for the world's first commercial sale of high-temperature superconducting cable.
2007 Sumitomo Wiring Systems, Ltd. was made a wholly owned subsidiary.
Nissin Electric Co., Ltd. was made a consolidated subsidiary.
2008 Opened the Technical Training Center.
Sumiden Friend, Ltd. (Special subsidiary) started operation.
2009 Eudyna Devices Inc. was made a wholly-owned subsidiary and changed its trade name to Sumitomo Electric Device Innovations, Inc.
2010 Opened the WinD Lab, a laboratory building.
SEI Optifrontier Co., Ltd. was organized.
2014 J-Power Systems Corporation was made a wholly-owned subsidiary.
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