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Shock absorbing hammer
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Patent number 9,016,171
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Issue date Apr 28, 2015
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Alex Chen
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Chisel
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Patent number 7,178,878
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Issue date Feb 20, 2007
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Black & Decker Inc.
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Markus Rompel
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Percussion tool
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Patent number 6,155,356
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Issue date Dec 5, 2000
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Hitachi Koki Co., Ltd.
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Atsuyuki Kikuchi
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Tool bit chuck
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Patent number 5,700,018
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Issue date Dec 23, 1997
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Hilti Aktiengesellschaft
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Hans-Werner Bongers-Ambrosius
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS