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ES350660A1
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Improvements in power transmitter mechanisms in motorized tools. (Machine-translation by Google Translate, not legally binding)
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US3419094A
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Drill string stabilizer
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US3385385A
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Drill bit
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GB1126531A
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Power-operated screwdriver or like tool
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US3385130A
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Dovetailed drill collar
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US3384191A
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Drill bit
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US3383946A
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Drill collar
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GB1035019A
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Impact wrench
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US3384426A
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Contoured race for roller bearings
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US3261414A
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Drill collar
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GB1056001A
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Method and apparatus for inhibiting formation of solid hydrocarbon hydrates
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US3332505A
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Drill bits
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US3318390A
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Mechanism for controlling tension in fasteners
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US3292719A
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Drill bit
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GB999846A
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Drill collar
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US3263481A
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Pneuma-hydraulic forming tool
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US3212590A
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Impact wrench
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US3257877A
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Power wrenches
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US3237427A
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Drill collar
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US3230020A
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Lubricator for drill bit
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