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Electropneumatic hammer drill
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Patent number 4,669,551
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Issue date Jun 2, 1987
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Hilti Aktiengesellschaft
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Wolfgang Lippacher
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Tool for placing self-drilling dowels
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Patent number 4,265,008
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Issue date May 5, 1981
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Hilti Aktiengesellschaft
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Wolfgang Lippacher
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Drilling and driving device
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Patent number 4,171,083
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Issue date Oct 16, 1979
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Hilti Aktiengesellschaft
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Wolfgang Lippacher
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Self-drilling dowel with drill head
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Patent number 4,157,677
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Issue date Jun 12, 1979
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Hilti Aktiengesellschaft
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Paul Deutschenbaur
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Depth stop for a drilling machine
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Patent number 4,113,404
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Issue date Sep 12, 1978
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Hilti Aktiengesellschaft
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Wolfgang Lippacher
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR