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