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Introduction to Derwent World Patents Index on ... - STN International

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DWPI records have two levels<br />

AN 1999-265576<br />

PI<br />

EP913216 A1<br />

CA2251524 A1<br />

CN1219449 A<br />

...<br />

INVENTION<br />

value-added data<br />

MEMBER 1<br />

EP913216 A1<br />

MEMBER 2<br />

CA2251524 A1<br />

PUBLICATION<br />

original member data<br />

MEMBER 3<br />

CN1219449 A<br />

13

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