Inventor
TAYAMA KISHIO
JP9 patents
Patents
9 patentsUS6533838B1Mar 18, 2003
High purity gallium for preparation of compound semiconductor, and method and apparatus for purifying the same
DOWA MINING CO14 citations78
US6838045B2Jan 4, 2005
Apparatus for metal purification
DOWA MINING CO6 citations73
US6814779B2Nov 9, 2004
Process for producing high-purity metals
DOWA MINING CO8 citations73
US6444164B2Sep 3, 2002
Apparatus for producing high-purity silver materials
DOWA MINING CO6 citations71
US6231637B1May 15, 2001
Process for producing high-purity silver materials
DOWA MINING CO11 citations71
US6805833B2Oct 19, 2004
Apparatus for enhanced purification of high-purity metals
DOWA MINING CO9 citations68
US6221232B1Apr 24, 2001
Electrolytic refining method for gallium and apparatus for use in the method
DOWA MINING CO14 citations67
US6627149B1Sep 30, 2003
High-purity silver wires for use in recording, acoustic or image transmission applications
DOWA MINING CO2 citations60
US6932852B2Aug 23, 2005
Method and apparatus for enhanced purification of high-purity metals
DOWA MINING CO1 citations46