Inventor
SCHAEFER RICHARD L
5 patents
Patents
5 patentsUS5725043AMar 10, 1998
Low pressure casting process and apparatus
SCHAEFER FRANK W INC48 citations88
US4027862AJun 7, 1977
Metal melting furnace with alternate heating systems
SCHAEFER FRANK W INC27 citations78
US6152159ANov 28, 2000
Valve assembly and method for use in delivery of molten metal
SCHAEFER FRANK W INC13 citations70
US5590681AJan 7, 1997
Valve assembly
SCHAEFER FRANK W INC13 citations69
US3996412ADec 7, 1976
Aluminum melting furnace
SCHAEFER FRANK W INC19 citations69