|
US2181322A
|
|
Measurement and control of the flow of viscous fluids
|
|
US2072204A
|
|
Measurement and control of the flow of viscous fluids
|
|
US1650622A
|
|
Temperature-controlling system
|
|
US1654642A
|
|
Electromagnetic fuel-control valve
|
|
US1515673A
|
|
Electromagnetic control of multiple valves
|
|
US1333542A
|
|
Lifting-magnet
|
|
CA109279A
|
|
Electric thermostat
|
|
US887088A
|
|
System of temperature control.
|
|
US887087A
|
|
Electric thermostat.
|
|
US865638A
|
|
Thermostat.
|
|
CA219555A
|
|
Electric contact thermostat
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