Inventor
HATAKEYAMA TOSHIHARU
JP5 patents
Patents
5 patentsUS6919120B2Jul 19, 2005
Plastic molding and a method and a mold assembly for producing the same
RICOH KK9 citations72
US6465610B1Oct 15, 2002
Method and apparatus for manufacturing plastic optical element and plastic optical element
RICOH KK7 citations72
US6918752B2Jul 19, 2005
Injection molding device with outside air inlet part
RICOH KK11 citations71
US6875380B2Apr 5, 2005
Method and apparatus for manufacturing plastic optical element and plastic optical element
RICOH KK3 citations61
US7261536B2Aug 28, 2007
Injection molding device with outside air inlet part
RICOH KK2 citations60