Sejong the Great died in April of 1450.
, otherwise known as Dojindo , is composed of a group of chemical companies that produce various reagents for use in research .. chemical. chemical. These products are used by many organizations such as universities , medical institutions , research institutes , and factories around the world .. universities. universities. medical. medical. factories. factories. The main branch is located in Kumamoto , Japan .. There are branches in Europe , China , and the United States -LRB- Dojindo Molecular Technologies , Inc. -RRB- .. Europe. Europe. China. China. United States. United States. Dojindo 's history can be traced back to the establishment of Dojindo Pharmacy by Keiji Ueno in 1910 .. It became incorporated in 1978 .. The current chairman is Keisyou Ueno , and the current president is Eiji Noda .. chairman. chairman. president. president