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Halogen Lamp Construction
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Brief History of Sigma Corporation

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SIGMA CORPORATION
Brief History of Sigma Corporation

Oct.1972 Aoi Electric Started as recycling AC dynamo / ignition starter, and its export business started.
Oct.1973 New factory built, and its site 1,200m2
Mar.1974 Aoi Electric Co.,Ltd. Established with its capital \3,000,000.
Die-designing, producting, and marketing, and press-processing started.
Dec.1974 Halogen lamp assembling started.
May.1977 Capital increased to \l0,000,000.
0ct.1980 Capital increased to \20,000,000.
JuL1983 The second factory built, and its site 460m2.
JuI.1983 Kanki factory in Kakogawa built, and halogen lamp production increased.
0ct.1985 Mitsuba Seiko Co.,Ltd. Established with its capital \3,000,000 and die-designing, producting, and marketing business seperated from Aoi Electric Co"Ltd.
Jan.1986 New factory for halogen lamp manufacturing built, and its site 3,000m2.
Feb.1987 Sigma Corporation built with its capital \20,000,000. Halogen lamp manufacturing business seperated from Aoi Electric Co.,Ltd" and its design, production, marketing started, and its export business started.
Jun.1988 Capital increased to \60,000,000.
Aug.1991 Capital increased to \66,700,000.
0ct.1993 Halogen lamp production for electric home appliances started.
Mar.1994 Capital increased to \95,000,000.
Mar.1996 New factory built, and its site 1,000m2.
Apr.1999 New factory site and Parking lot built, and its site 1,100m2.
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