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US2077679A
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Water level control for boilers
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GB377832A
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Improvements in fittings for gauge glass connectors
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US1850620A
|
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Combined gauge glass protector, illuminator, and glare eliminator
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US1756184A
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Gauge-glass fitting
|
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US1832106A
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Gauge glass connecter
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US1691545A
|
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Gauge-glass attachment
|
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US1701914A
|
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Water gauge
|
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GB225470A
|
|
Improvements in gage glasses for steam boilers and the like
|
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US1511325A
|
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Combined water column and inclined gauge glass
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GB213731A
|
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Gage glasses for steam boilers or like apparatus
|
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US1491594A
|
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Try cock
|
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US1448920A
|
|
Variable-angle gauge glass
|
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US1459952A
|
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Safety gauge glass
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US1343043A
|
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Test-valve
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