u1983. 10. Established Hansung Special Glass Co. (Building Glass Industry)

u1989. 02. Changed Hansung Special Glass Co., Ltd.

u1989. 11. Acquiring Licenses for Professional Construction Industry

u1996. 03. Headquarter and factory relocation (Gumsan Local Industrial Park)

u1996 11. Acquiring ISO9002 Certification

u1997-05. Obtaining EM Markings and Quality Certificates

u1998. 06. New Technology Certification (NT) Acquisition

u2000. 02. Cross-replace to Hans, Inc

u2005-01. Established Hans Munchang Yuhan Corporation (Beijing, China)

u2006-01. New Product Certificate (NEP) 

u2007. 12. Establishment of a subsidiary research institute for enterprises 

u2010. 10. Winning the LH Green Local Government Contest (Descendants of the Sun)  

u2010. 08. Patent Office registration for solar double-layer glass system (PTO No. 10 – 0978525)

u2011-12. Solar Cell Module NEP Certification

u2013-04 Designation of superior products for solar and power generation devices (Processor designated number: 2013017)

u2018: 01 Patent registration for fine dust inhalation lens hood (10-2018-0003662)