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US2907460A
|
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Filter system coordinated fluid level control
|
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US2876789A
|
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Apparatus for use with liquid enclosures
|
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US2385772A
|
|
Metering apparatus
|
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US2266955A
|
|
Manometer
|
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US2219220A
|
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Piezometer connection
|
|
US2204788A
|
|
Air release valve for sewage lines
|
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US2135383A
|
|
Vacuum breaker
|
|
US2134597A
|
|
Compensated flow control system
|
|
US2159882A
|
|
Integrator
|
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US1975711A
|
|
Reverse flow meter
|
|
US2076442A
|
|
Multiple totalizing register
|
|
US1975710A
|
|
Flow indicator
|
|
US1878460A
|
|
Double-indicating double-recording gauge
|
|
US1936538A
|
|
Fluid proportion controller
|
|
US1988992A
|
|
Automatic volume controller
|
|
US1936537A
|
|
Air-vacuum valve combined with airrelease valve
|
|
CA322118A
|
|
Flow indicator for hydraulic turbines
|
|
CA630139A
|
|
Coordinated fluid level-control
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