Method of molding
United States Patent 2490193
US Patent References:
/1130974.html
- - 1130974

/1320770.html
- - 1320770

/1325004.html
- - 1325004

Automatic casting machine
- - 1659638

Method for making molds for inlays and crowns
- - 1796470


Inventors:
Barr, Roy E.
Publication Date:
12/06/1949
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Assignee:
Barr, Roy E.
Primary Class:
Other Classes:
264/334, 264/221, 264/16, 264/71
International Classes:
B22C9/04; B22D25/02; B22D25/00
US Patent References:
1942981Electric furnace
2416506Vacuum apparatus for investing patterns