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Espacenet:freeaccesstomillionsofpatentdocuments.Findoutifyourinventionisuniqueorifotherinventorshavefiledpatentapplicationsthatare ...,2021年11月24日—Espacenetisaccessibletobeginnersandexpertsandisupdateddaily.Itcontainsdataonmorethan130millionpatentdocumentsfrom ...
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Espacenet – patent search | Patent search
Espacenet: free access to millions of patent documents. Find out if your invention is unique or if other inventors have filed patent applications that are ... Read More
Espacenet | Patent search
2021年11月24日 — Espacenet is accessible to beginners and experts and is updated daily. It contains data on more than 130 million patent documents from ... Read More
Google Patent Search | Patent search
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Google Patents | Patent search
Search and read the full text of patents from around the world with Google Patents, and find prior art in our index of non-patent literature. Read More
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The Google Patent search engine can search full-text US patents. You can choose the fields and syntax including patent number, inventor name, patentee, the ... Read More
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Patent search and analysis. PATENTSCOPE. Using PATENTSCOPE you can search through more than 43 million patent documents, including international patent ... Read More
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2018年10月18日 — Patents may be searched in the USPTO Patent Full-Text and Image Database (PatFT). The USPTO houses full text for patents issued from 1976 to the ... Read More
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2019年10月16日 — Home page of the United States Patent and Trademark Office's main web site. Read More
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