| » Esp@cenet | Esp@cenet is very good for researching international patent families. |
| » Thomson Innovation | The Thomson Innovation site is also good and includes US, European and PCT files. |
| » Google Patent | Google Patent can provide a rewarding alternative search. |
| » Prosecution histories of US patents | Prosecution histories of US patents and patent filings can be found here. |
| » US Patent and Trademark Office (USPTO) | For patent searching, the US Patent and Trademark Office (USPTO) site is good, since it allows full-text Boolean searches. |
| » Dialog | The Dialog pay as you go site is recommended for trade mark searches and for non-US patent searching. |
