|
US2063961A
|
|
Kite plane
|
|
US1765462A
|
|
Apparatus for discharging cores from castings and for cleaning castings
|
|
US1768802A
|
|
Method and apparatus for forming greensand cores
|
|
US1653675A
|
|
Apparatus for forming sand molds
|
|
US1645828A
|
|
Automatic valve mechanism
|
|
US1768429A
|
|
Method for forming sand-molds
|
|
US1768428A
|
|
Apparatus for cleaning castings
|
|
US1535186A
|
|
Core for casting molds
|
|
US1570716A
|
|
Cleaning apparatus
|
|
US1524060A
|
|
Hook mechanism
|
|
US1371271A
|
|
Method of making molds
|
|
US1470402A
|
|
Molding machine
|
|
US1442104A
|
|
Collapsible arbor
|
|
US1343941A
|
|
Method of making molds
|
|
US1113709A
|
|
Molding-machine.
|
|
US1343940A
|
|
Molding-machine
|
|
US1004602A
|
|
Molding-machine.
|
|
US1004708A
|
|
Molding-machine.
|
|
CA271140A
|
|
Method of forming sand moulds
|
|
CA259957A
|
|
Apparatus for cleaning castings
|
