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US1878432A
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Oil well screen
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US1729197A
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Armored well screen and method of making the same
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US1635368A
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Guarded opening screen
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US1701079A
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Rotary well-pumping mechanism
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US1642914A
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Sandproof bearing
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US1654740A
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Protection for pump bearings
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US1721701A
|
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Driving mechanism
|
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US1709478A
|
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Centrifugal pump
|
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US1656281A
|
|
Rotary well mechanism
|
|
US1759234A
|
|
Thrust-bearing-aligning method
|
|
US1745547A
|
|
Rotary pump mechanism
|
|
US1577737A
|
|
Means for facilitating the removal or disassembling of rotary pump mechanism
|
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US1652368A
|
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Coupling for suspended shaft casings
|
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US1725401A
|
|
Driving mechanism
|
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US1532592A
|
|
Means for forming well screens
|
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US1523024A
|
|
Lubricating means for pump bearings
|
|
US1522980A
|
|
Rotary-pump mechanism
|
|
US1728685A
|
|
Rotary pump mechanism
|
|
US1491150A
|
|
Rotary-pump bearing
|
|
US1435362A
|
|
Well mechanism
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