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US2171288A
|
|
Coupler for train pipes
|
|
US1982643A
|
|
Train pipe coupler
|
|
US1951598A
|
|
Electric heater
|
|
US1960937A
|
|
Steam pressure regulating means
|
|
US1920635A
|
|
Gasket-attaching means
|
|
US1933083A
|
|
Thermostat
|
|
US1928777A
|
|
Thermostatic, electric, circuitcontroller
|
|
US1939330A
|
|
Water heating and fluid pressure regulating device
|
|
US1792490A
|
|
Coupler for hose or pipe ends
|
|
US1738690A
|
|
End train-pipe valve
|
|
US1763886A
|
|
Nipple-inserting machine
|
|
US1848123A
|
|
Train pipe connection
|
|
US1737585A
|
|
Thermostatic valve
|
|
US1826770A
|
|
Hose or pipe coupler
|
|
US1655119A
|
|
Protected thermometric electric-circuit closer
|
|
US1651522A
|
|
Pipe joint
|
|
US1559042A
|
|
Heating system
|
|
US1454635A
|
|
Thermostatic electric control for heating systems
|
|
US1439069A
|
|
Thermostatic valve for heating systems
|
|
US1418913A
|
|
Protected thermostat
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