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Search the Derwent World Patents Index
The Derwent World Patents Index (Derwent WPI), the largest value-added
patent database in the world, is now available from Delphion.
Derwent adds value to patent data through a process of rigorous
classification, abstracting and indexing. Searching is both fast and
easy -- in addition to simple keyword searching, you can also search
by accession number, Boolean text, and multiple text fields. And
because Delphion provides access to a wide variety of other data
collections, you can easily link to other documents for immediate
access to related information. For example, from each Derwent record
you can simultaneously view text and image data, browse class codes,
and access related patents.
To find out how Derwent searching works on a week of data, try a free demo search by following one of the demo links below . Then
move on to the real Derwent search forms to search the full
collection. Before searching the full Derwent collection, you must submit a billing
activation form, agreeing to the terms of use. See information on
pricing.
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