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Drilling and chiseling tool

Tool driving or impacting – Impacting devices – With means for rotating tool
Patent

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Drilling and percussion hammer

Tool driving or impacting – Impacting devices – With means for rotating tool
Patent

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Drilling and/or chiseling device

Tool driving or impacting – Drive adjustable to completely change kind of drive – Adjustable to impacting device
Reexamination Certificate

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Drilling and/or chiseling tool

Tool driving or impacting – Impacting devices – With means for rotating tool
Patent

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Drilling and/or chiselling tool

Tool driving or impacting – Impacting devices – Hammer head driven by pulsating fluid pressure
Patent

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Drilling and/or hammering tool

Tool driving or impacting – Means to drive tool about an axis – Electric motor
Reexamination Certificate

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Drilling and/or lifting machine

Tool driving or impacting – With vehicle support for drive – Drive structure moved to nonuse position for transport
Patent

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Drilling and/or percussion power tool

Tool driving or impacting – Impacting devices – With impact cushioning means
Patent

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Drilling and/or striking hammer with a lubricating device

Tool driving or impacting – Processes
Reexamination Certificate

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Drilling apparatus

Tool driving or impacting – With indicating or signaling means
Patent

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Drilling apparatus

Tool driving or impacting – Drive by means reacting to rotating eccentric mass
Patent

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Drilling apparatus

Tool driving or impacting – With work engaging means supporting drive – Structure extends between opposed points
Patent

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Drilling apparatus

Tool driving or impacting – With vehicle support for drive
Patent

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Drilling apparatus

Tool driving or impacting – Advance causing or controlling means
Patent

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Drilling apparatus and technique using down-hole motor

Tool driving or impacting – Work cleansing – Cleansing fluid passage in impact transmitting anvil
Patent

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Drilling apparatus mounted on wheels, with articulated chassis

Tool driving or impacting – With vehicle support for drive
Patent

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Drilling assembly

Tool driving or impacting – With means to adjust position of axis of tool advance – Adjustment powered by motor or mechanism
Patent

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Drilling assembly for percussion drilling of deep wells

Tool driving or impacting – Work cleansing – By motive fluid for drive motor or advance causing or...
Patent

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Drilling boom

Tool driving or impacting – Drive by means reacting to rotating eccentric mass
Patent

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Drilling boom

Tool driving or impacting – Drive by means reacting to rotating eccentric mass
Patent

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