21 Utility and 1 Design Patents
#276 in Taichung
#4,292 in Taiwan
#157,673 in the World
rank by utility patentsForward Citations = 132
Company Filing History:
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Changs-ascending Enterprise Co
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#276 in Taichung
#4,292 in Taiwan
#157,673 in the World
rank by utility patentsCompany Filing History:
Get your Inventor Badge Today