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US2919910A
|
|
Air pressure control system
|
|
US3011774A
|
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Air balanced oil well equipment
|
|
US2766589A
|
|
Hydrokinetic torque converter fluid pressure control system
|
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US2805042A
|
|
Weight control, hoisting and drilling apparatus
|
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US2723530A
|
|
Torus chamber type torque converter fluid control system
|
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US2692516A
|
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Change-speed transmission
|
|
US2692514A
|
|
Tractor drive
|
|
US2719442A
|
|
Power transmission unit
|
|
US2753738A
|
|
Power transmitting apparatus
|
|
US2714804A
|
|
Hydrokinetic torque transmitter and cooling system therefor
|
|
US2918830A
|
|
Drive mechanism
|
|
US2555454A
|
|
Planetary gearing
|
|
US2498572A
|
|
Hydrokinetic brake
|
|
US2588408A
|
|
Oil well drilling transmission
|
|
US2542259A
|
|
Unloader valve
|
|
US2558976A
|
|
Rotary hydrokinetic torque converter with cooling system
|
|
US2491329A
|
|
Hydrokinetic brake
|
|
US2640685A
|
|
Electric drilling mechanism
|
|
US2634099A
|
|
Automatic drilling machine
|
|
US2589121A
|
|
Automatic drilling machine
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