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US3280922A
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Coring device
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US3353612A
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Method and apparatus for exploration of the water bottom regions
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US3227228A
|
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Rotary drilling and borehole coring apparatus and method
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US3183787A
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Fluid motor
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US2717760A
|
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Apparatus for taking a sample of an earth formation
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US2707008A
|
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Tree-handling method and airborne apparatus
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US2657880A
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Parachute-equipped helicopter
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US2717656A
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Method and apparatus for use in surveying earth formation by explosion and seismograph
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US2559842A
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Shaft-oscillating fluid-actuated motor having spring-and-latch valve-reversing means
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US2573382A
|
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Portable oscillating propeller assembly
|
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US2599042A
|
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Excavating apparatus
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US2583316A
|
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Method and apparatus for setting a casing structure in a well hole or the like
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US2599041A
|
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Apparatus for enlarging and straightening wellholes
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US2600607A
|
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Load-sustaining and fluid-conducting hose
|
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US2599040A
|
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Sample-taking and casing-perforating apparatus
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US2477436A
|
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Fluid-conducting and pressurecushioning device
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US2325465A
|
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Method of making hose
|
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US2387002A
|
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Apparatus for cementing the wall of an earth boring
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US2345024A
|
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Percussion type motor assembly
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US2325464A
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Hose
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