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Grass trimmer
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Patent number 11,818,979
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Issue date Nov 21, 2023
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Nanjing Chervon Industry Co., Ltd.
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Jianpeng Guo
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A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
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Blade clamping device
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Patent number 7,784,388
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Issue date Aug 31, 2010
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Chervon Limited
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Yasheng Chen
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Laser distance finder
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Patent number 7,609,364
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Issue date Oct 27, 2009
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Chervon Limited
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Yuzhong Zhao
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G01 - MEASURING TESTING
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Laser leveling device
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Patent number 7,536,801
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Issue date May 26, 2009
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Chervon Limited
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Yuexiang Zhang
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G01 - MEASURING TESTING
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Laser distance finder
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Patent number D582303
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Issue date Dec 9, 2008
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Chervon Limited
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Guillaume Keller
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D10 - Measuring, testing, or signalling instruments