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by tanky18
Wed Apr 14, 2021 6:52 am
Forum: Asian Patent Information Services
Topic: CNIPA Patent Data Sub-class A61
Replies: 1
Views: 4019

CNIPA Patent Data Sub-class A61

Hi All,

I am seeking advice on retrieving the CNIPA patent data sub-class A61 from 2000-2020 for a study. Anyone with experience to provide the guidance?

thank in advance
tanky18