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1987. 10. Establishment of TECKRAF Co., Ltd. (Hapduck Factory)
1988. 05. Licensing Agreement with Wilson Greatbatch for Lithium Battery(Shinam Factory)
1990. 04. Registration of the supplier of Korean Military Defense
1991. 03. Mass Production of
1991. 05. Establishment of R&D Center

1992. 06. Production of Bobbin Type
1993. 07. Production of
1993. 10. Nominated as one of the Korean Military Defense Company
1998. 01. Production of Material Resource
2000. 07. Enlisted Venture Company with new Technology
2001. 10. ISO 9001:2000 Approval

2002. 03. Finishing the Reorganization of company (Vitzro-teck.co.,LTD, KTB network co.,LTD)
2002. 07. - Vitzrocell.co.,LTD
2003. 06. Consolidation of Dangjin factory and Yesan Factory
2003. 12. Finished construction of ERP system
2004. 06. Nominated by Korean S&M Business administration as a INNO-BIZ company
2004. 06. Nominated By Korean Tech Credit Guarantee Fund as a Excellent Tech company
2004. 11. Awarding a prize of USD 10 million export trophy
2004. 12. Re-authentication of Venture Company (New Technology company) by small and Medium business administration
2005. 04. Nominated by ministry of commerce, industry and energy as a Advanced Technology R&D center