德温特世界专利索引 Education and Research Yizuo Media

漢德百科全書 | 汉德百科全书

Chinese — German

Education and Research

Science and technology Patents and trademarks Catalog

Science and technology Global Innovators

德温特世界专利索引

de2 wen1 te4 shi4 jie4 zhuan1 li4 suo3 ying3

1 3 years ago

First author

Derwent World Patent Index,DWPI

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Author

7 years ago 3 years ago