|
US834704A
|
|
Electric fluid-pressure switching and signal appliance.
|
|
US850412A
|
|
Automatic fluid-pressure and motor controller.
|
|
US807431A
|
|
Electric controlling mechanism for railway appliances.
|
|
US804298A
|
|
Automatic safety crossing system for railways.
|
|
US804297A
|
|
Safety crossing system for railways.
|
|
US797398A
|
|
Electrofluid-pressure switching mechanism.
|
|
US789649A
|
|
Electrofluid-pressure switching mechanism.
|
|
US765266A
|
|
Audible signaling device.
|
|
US810609A
|
|
Electrofluid pressure mechanism for operating railroad appliances.
|
|
US781993A
|
|
Circuit-closer.
|
|
US764836A
|
|
Electro fluid-pressure switching mechanism.
|
|
US765265A
|
|
Railway-crossing appliance.
|
|
US765264A
|
|
Railway-crossing signal.
|
|
US765263A
|
|
Electro fluid-pressure switching mechanism.
|
|
US774373A
|
|
Street-railway switching mechanism.
|
|
US747847A
|
|
Street-railway switching mechanism.
|
|
US727064A
|
|
Circuit-closer.
|
|
US741097A
|
|
Street-railway switch.
|
|
US721000A
|
|
Street-railway switch.
|
|
US721416A
|
|
Street-railway switch.
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