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Air purifier
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Patent number D889621
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Issue date Jul 7, 2020
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Hung Hsing Electric Co., Ltd.
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Ping Huang
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D23 - Environmental heating and cooling
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Structure of an electrostatic precipitator
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Patent number 6,958,089
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Issue date Oct 25, 2005
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Hung Hsing Electric Co., Ltd.
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Ping Huang
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B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...
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Electrostatic precipitator
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Patent number 6,852,149
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Issue date Feb 8, 2005
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Hung Hsing Electric Co., Ltd.
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Ping Huang
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B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...
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Air purifier
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Patent number 6,645,266
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Issue date Nov 11, 2003
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Hung Hsing Electric Co., Ltd.
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Ping Huang
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F24 - HEATING RANGES VENTILATING
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Air purifier
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Patent number 5,332,425
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Issue date Jul 26, 1994
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Hung Hsing Electric Co., Ltd.
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Ping Huang
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F24 - HEATING RANGES VENTILATING