Search Tips & Samples
Improve your searching techniques at our free training workshops
Search Tips
Patent searching
- Searching for US Applications in the Derwent patent files on Dialog, STN and Questel.Orbit
- Searching for Japanese Patent Numbers on Derwent World Patents Index
- Patent Family Searching using Derwent World Patents Index
- Useful Formats for Derwent World Patents Index
- International Patent Classification
Subject searching
- Using Patent Citations to Enhance your Subject Searching
- Using Derwent Classification to improve your subject searching
- Derwent Electrical Patents Index Manual Codes
Curent awareness searching
Competitor intelligence
- Using Derwent's Databases for Competitor Intelligence
- Using Derwent Classification to Identify a Company's Key Activities
Search Samples
The following sample searches are available as PDF documents.
| STN | Dialog | Questel.Orbit |
|---|---|---|