|
US2511365A
|
|
Switch box
|
|
US2366978A
|
|
Welding
|
|
US2260578A
|
|
Automobile construction
|
|
US1726235A
|
|
Radiator
|
|
US1702058A
|
|
Superheater
|
|
US1702057A
|
|
Flexible shaft coupling
|
|
US1709088A
|
|
Boiler wall
|
|
US1699541A
|
|
Making tubular fittings and the like
|
|
US1702056A
|
|
Pump for refrigerants
|
|
US1686340A
|
|
Pump for refrigerants and the like
|
|
US1719825A
|
|
Pump for refrigerants and the like
|
|
US1686339A
|
|
Pump for refrigerants and the like
|
|
US1696725A
|
|
Drum, pipe, fittings, etc.
|
|
US1693043A
|
|
Heater
|
|
US1687879A
|
|
Forming ways or ducts in plastic material
|
|
US1600696A
|
|
Molding conduits
|
|
US1730472A
|
|
Building floors with ducts
|
|
US1723573A
|
|
Radiator
|
|
US1674445A
|
|
Molding conduits
|
|
US1683046A
|
|
Boiler
|
