Latest Inventions, Goods, Services
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2018
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Invention
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Pile head reinforcing structure using excavation bit, which enables multi-stage reaming and to wh... |
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2017
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Invention
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Excavation bit and excavation steel pipe. The present invention relates to an excavation bit capa... |
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2016
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Invention
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Excavation bit. The present invention relates to an excavation bit, and the excavation bit may co... |
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2015
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Invention
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Dual computer security system and method using non-contact card. A dual computer security system ... |
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2013
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Invention
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Ground excavation hammer bit system and pile driving method using same. The present invention rel... |
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