Derwent World Patents Index - Reference Information
Coverage Information
- Latest Updates — Latest country publication dates and serial numbers
- Country Coverage and Kind Codes — Document types (Kind Codes) included in DWPI for each authority
- Kind Codes — an introduction to patent specification descriptors
- Number of records — statistical details of our coverage
- DWPI Coverage map 316 KB
Host Information
Reference Tools For Developing Search Strategies
- 2010 Online Database Price List — Prices are in US$, contact your host for local currency pricing 282 KB
- American/British Dictionary — Listing of American/British spelling differences
- DWPI Standard Abbreviations — Common abbreviations used in Thomson Scientific's value-add titles and abstracts
- DWPI — Details of Thomson Scientific's simple Classification System for all technologies
- Patent Assignee Codes — Information on how these are developed and applied
- Patentee Code Lookup Facility — Search facility for Thomson Scientific Patentee Assignee codes
- Polymer Indexing news — News and assistance for polymer searchers
- Search Commands Comparison — Comparison of common search terms PDF
- Search Tips & Samples — Help with online patent searching
- WIPO Codes — World Intellectual Property Organization Country Codes
- Glossary of Thomson Scientific Terminology
IPC reform
Subsections
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