2005 03-Jul Reviewed Business Plan and Feasibility2005 18-Jul Registered corporate 21 Century Environment Co., Ltd.2005 29-Jul Tax registration and contracted Dongmyung Industrial Complex2005 04-Aug Contracted real estate for factory in Dongmyun Industrial Complex2005 01-Oct Commissioned factory2006 20-Feb Registered manufacturing of sewage disposal facility and single sewage disposal tank2006 02-Mar Manufactured/Sold sewage disposal facility(FRP), PE sewage disposal tank and PE single sewage disposal tank2006 20-Mar Additional registered of manufacturing item (sewage disposal tank, FRP, cylinder type)/septic tank method for 15, 20, 25, 30 people2006 11-Mar Registered design and construction of private sewage disposal facility2006 25-May Revised registration of product item (HBC engineering method, FRP, cylinder type)/50m2/day(cylinder type)2007 29-Mar Changed Representative Director2007 13-Jul Additional registered of manufacturing item (aerobic biologic method, PE one-body type) 1m3/day(for riparian area)2007 05-Oct Additional registered of manufacturing item (septic tank method, PE one-body type) sewage disposal tank for 5 people2007 30-Oct Additional registered for manufacturing item (septic tank method, PE one-body type) sewage disposal tank for 10 people2008 21-Jan Patent of organic waste treatment device2010 27-Jan Registered utility design (portable toilet)2010 03-Oct Patent of sewage disposal device and method2010 24-Dec In-house production certificate (sewage disposal device, portable toilet)2012 04-Feb Patent of recycle natural circulation sewage disposal device2013 01-Apr Registered small business2013 14-Apr Registered Woman business2013 10-Mar Patent for reduction device of non-point pollution installed at the flow route of fluid, Patent of solid support for sewage disposal
