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عمومی::
شاخص استنادی حق ثبت اختراع
The earliest is the British Patents Citation Index (PCI) established in 1995, the predecessor of Derwent Innovations Index (DII) that was built in 1999 jointly with the American Institute for Scientific Information (ISI) with the data dat- ing back to 1963 and covering 18 million patents from more than 40 patent institutions across the world.
Patents Citation Index (PCI), 118 Pay-per-click (PPC), 15
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