US1766191A
|
|
Fuel-saving device
|
US1613907A
|
|
Fuel-saving device
|
US1607692A
|
|
Preheated-air feeder for fire pots
|
US1582349A
|
|
Fuel-saving device
|
US1607691A
|
|
Fuel-saving device for furnaces
|
US1475599A
|
|
Fuel-saving device for furnaces
|
US1473050A
|
|
Fuel-saving device for furnaces
|
US1380597A
|
|
Fuel-saving attachment for furnaces
|
US1205789A
|
|
Fuel-saving attachment for furnaces.
|
CA164191A
|
|
Furnace mechanism
|
US1150456A
|
|
Fuel-saving attachment for furnaces.
|
US1103224A
|
|
Pump-actuating mechanism for carbureters.
|
US1138151A
|
|
Actuating mechanism for gas-generating machines.
|