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US3104121A
|
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High pressure seal assembly
|
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ES235630A1
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A conical threading system (Machine-translation by Google Translate, not legally binding)
|
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GB812506A
|
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Improvements relating to tapered screw-thread connections, for example, for pipes
|
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US3083043A
|
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Taper thread system for coupling or joint
|
|
US2877287A
|
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Electrical swivel assemblies
|
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US2896502A
|
|
Colorimeter apparatus
|
|
US2887118A
|
|
Pipe cleaning devices
|
|
US2767138A
|
|
Pipe line cleaning method
|
|
US2684689A
|
|
Cushioned exhaust for automatic shutoff valves
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|
US2673660A
|
|
Pressure relief device
|
|
US2684688A
|
|
Automatic valve and system
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