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2017
- 2017. 02 Electronic board, Traffic information board direct producing
- 2017. 05 Announce system, Access control system
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2016
- 2016. 03 Bus and traffic guide apparatus direct producing
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2015
- 2015. 02 Software development direct producing
- 2015. 11 Imagery sensing direct producing
- 2015. 12 Combined lathe direct producing
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2014
- 2014. 05 Licensing electricity business
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2012
- 2012. 06 Establish a Co, Ltd Deahan Information communication
- 2012. 11 Licensing information communication engineering
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2011
- 2011. 11 Licensing ISO 10004
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2003
- 2003. 01 Co, Ltd KT - Jeonnam cooperation railroad construction
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2001
- 2001. 03 Joining Electronics Industries Association of Korea
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1999
- 1999. 06 Joining Korea metal industry cooperative
- 1999. 09 Licensing ISO 9001
- 1999. 10 Licensing software business
- 1999. 10 Change the company name to Deahan information communication
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1997
- 1997. 12 Licensing information communication business
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1995
- 1995. 12 Founding Deahan Telecom
- 1995. 10 Licensing from the Ministry of Information and Communication