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Click to go Global Patent Search System
Click to go 2.Taiwan Patent Search System
Click to go 3.Intellectual Property Office
Click to go 4.UNITED STATES PATENT AND TRADEMARK OFFICE
Click to go 5.JAPAN PATENT OFFICE
Click to go 6.Intellectual Property Office
Click to go 7.Deutshes Patent-und Markenamt
Click to go 8.European Patent Office
Click to go 9.Government of Canada
Click to go 10. Espacenet Patent search
Click to go 11.China National Intellectual Property Administration
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