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

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DWPI subject coverage<br />

• 1963<br />

• 1965<br />

• 1966<br />

• 1970<br />

• 1974<br />

Pharmaceuticals<br />

Agriculture Chemicals<br />

Plastics & Polymers<br />

Rest of Chemistry<br />

All technologies<br />

11

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