US1672805A
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Reciprocating-plunger mechanism
|
US1587285A
|
|
Transformer cooler
|
US1601943A
|
|
Pressure-responsive device
|
US1637736A
|
|
Gate valve
|
US1587284A
|
|
Radiator cooler
|
US1577177A
|
|
Valve
|
US1627376A
|
|
Pump-control mechanism
|
US1676818A
|
|
Pump-contrclling mechanism
|
US1695368A
|
|
Controlling mechanism for compressors
|
US1568500A
|
|
Pump-controlling mechanism
|
US1567184A
|
|
Pump-controlling apparatus
|
US1568499A
|
|
Pump-controlling mechanism
|
US1557428A
|
|
Electric-motor load-controlling device
|
US1557425A
|
|
Pressure-controlled valve mechanism
|
US1557426A
|
|
Unloader mechanism
|
US1557427A
|
|
Motor load-controlling device
|
US1701870A
|
|
Method of and apparatus for treating oil and its constituents
|
US1567183A
|
|
Oil-well apparatus and method of operating the same
|
US1575623A
|
|
Tank-discharge device
|
US1556760A
|
|
Tank-discharge device
|