|
US2808879A
|
|
Air gas mixer
|
|
US2800318A
|
|
Slot furnace
|
|
US2727306A
|
|
Butter cutting and dispensing apparatus
|
|
US2656171A
|
|
Furnace for heating crucibles and the like
|
|
US2171340A
|
|
Material processing apparatus
|
|
US2232124A
|
|
Mechanically vibrated mechanism
|
|
US2236341A
|
|
Vibratory material handling screen mechanism
|
|
US2109395A
|
|
Mechanical movement applicable to material screening apparatus
|
|
US1989172A
|
|
Apparatus for electric welding
|
|
US1964265A
|
|
Electromagnetic device
|
|
US1160428A
|
|
Art of metal-working.
|
|
CA521985A
|
|
Furnaces for heating crucibles and the like
|
