Amazon 亞馬遜如何知道產品有沒有侵權
本帖最後由 joe 於 2020-7-18 17:59 編輯RPNNdPKAYnE
04:40
06:00 USPTO.gov (美國專利商標局)
http://tmsearch.uspto.gov/bin/gate.exe?f=searchss&state=4810:1hj8pj.1.1
07:18 Google Patents
https://patents.google.com/
08:13 copyright.gov
https://copyright.gov/
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