US3989010A
|
|
Desulfurization of high sulfur fuels during combustion
|
US3933127A
|
|
Desulfurization of high sulfur fuels during combustion
|
US3321772A
|
|
Swim cap
|
US2938708A
|
|
Simultaneous drilling and electrical logging of hydrocarbon contents of formations
|
US2978634A
|
|
Apparatus for logging wells
|
US2987822A
|
|
Depth measurement
|
US2924432A
|
|
Earth borehole logging system
|
US2890019A
|
|
Earth borehole logging system
|
US2930137A
|
|
Earth borehole crookedness detection and indication
|
US2759143A
|
|
Earth borehole investigation-signaling system
|
US2917704A
|
|
Earth formation logging system
|
US2925251A
|
|
Earth well borehole drilling and logging system
|
US2755432A
|
|
Logging while drilling
|
US2806372A
|
|
Borehole logging apparatus
|
US2677790A
|
|
Borehole logging by intermittent signaling
|
US2700897A
|
|
Continuous electrical logging
|
US2787759A
|
|
Apparatus for logging wells
|
US2557168A
|
|
Continuous electric logging while drilling
|
US2524031A
|
|
Apparatus for logging wells
|
CA578484A
|
|
Earth borehole investigation-signaling system
|