HISTORY
- 1951
- Mr. Yoshio Kawashima establishes Sun Dengyosha.
- 1953
- Succeed to develop domestic-made Precision Snap Action Switch.
- 1959
- Succeed to develop highlight-force operated Precision Snap Action Switch which is reputed the best quality of domestic made.
- 1970
- Construct Iwate Factory.
- 1974
- Starts production of Illuminated Pushbutton Switch.
- 1975
- Succeed to develop Cross-bar Contact Precision Snap Action Switch.
- 1985
- Mr. Yoshihisa Kawashima assumes the President and former President Mr. Yoshio Kawashima assumes Chairman of the Board.
- 1989
- Construct new building and greatly extend Iwate Factory.
- 1991
- Have 40th Anniversary. Change company name to "SUNMULON CO.,LTD."
- 1997
- Iwate Factory acquire ISO9002.
- 1998
- Head Office, Iwate Factory acquire ISO9001.
- 1999
- Starts new company's website.
- 2001
- 50th Anniversary.
- 2004
- Head Office and Iwate Factory acquire ISO14001. Starts manufacture products that applicable to EU RoHS Directive.
- 2009
- Head Office and Iwate Factory acquire ISO9001:2008.
- 2011
- 60th Anniversary.
- 2016
- Have 65th Anniversary. Starts new company's website.
- 2018
- Mr. Keisuke Kawashima assumes the President and former President Mr. Yoshihisa Kawashima assumes Chairman of the Board.
- 2021
- 70th Anniversary.
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