|
US1791752A
|
|
Hopper-feed for coal stokers
|
|
US1752421A
|
|
Aeroplane-wing construction
|
|
US1860138A
|
|
Method of making water gas
|
|
US1804824A
|
|
Aeroplane wing
|
|
US1657371A
|
|
Method of making producer gas
|
|
US1751725A
|
|
Heat exchanger
|
|
US1744262A
|
|
Process and apparatus for treating petroleum oils
|
|
US1666119A
|
|
Process for converting petroleum hydrocarbons
|
|
US1734079A
|
|
Heater
|
|
US1621475A
|
|
Method and apparatus for treating petroleum hydrocarbons
|
|
US1637105A
|
|
Turbine
|
|
US1742175A
|
|
Tube fitting
|
|
US1515661A
|
|
Compound plug
|
|
US1059980A
|
|
Steam-generating system.
|
|
US956569A
|
|
Destruction of garbage and recovery of by-products.
|
|
US869232A
|
|
Gas-generator.
|
