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Rock drill
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Patent number 5,265,688
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Issue date Nov 30, 1993
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Hilti Aktiengesellschaft
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Gerhard Rumpp
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E21 - EARTH DRILLING MINING
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Tool for use in a hand power device
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Patent number 5,076,371
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Issue date Dec 31, 1991
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Robert Bosch GmbH
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Josef Obermeier
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Rock drill
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Patent number 4,549,616
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Issue date Oct 29, 1985
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Hilti Aktiengesellschaft
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Gerhard Rumpp
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E21 - EARTH DRILLING MINING
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Tool holder device
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Patent number 4,491,444
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Issue date Jan 1, 1985
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Hilti Aktiengesellschaft
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Gerhard Rumpp
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Rock drill
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Patent number 4,458,769
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Issue date Jul 10, 1984
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Hilti Aktiengesellschaft
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Gerhard Rumpp
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E21 - EARTH DRILLING MINING
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Handle for a hand-held device
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Patent number 4,381,579
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Issue date May 3, 1983
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Hilti Aktiengesellschaft
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Gerhard Rumpp
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS