|
US2313681A
|
|
Recovery of liquid hydrocarbons from well fluids
|
|
US1747191A
|
|
Apparatus for burning fuel
|
|
US1818015A
|
|
Cooling unit for refrigerating systems
|
|
US1688027A
|
|
Discharge-valve structure for compressors
|
|
US1810582A
|
|
Shaft sealing device
|
|
US1251128A
|
|
Forging apparatus.
|
|
US1212120A
|
|
Process for forming hollow forgings.
|
|
US1155378A
|
|
Needle-holder.
|
|
US1111041A
|
|
Tongue-switch.
|
|
US1101577A
|
|
Cast-metal railway-crossing.
|
|
US1090822A
|
|
Tongue-switch.
|
|
US1053545A
|
|
Bridge-crane.
|
|
US770784A
|
|
Pressure control for air-compressors.
|
|
US770785A
|
|
Pressure control for air-compressors.
|
|
US770783A
|
|
Valve for air-compressors.
|
|
US807585A
|
|
Valve for air-compressors.
|
|
US692490A
|
|
Inserted saw-tooth.
|
