Patent Databases
- Patent Databases
- Patent Classfication Links
- Searching for Patents and Other IP Data
Metasites for information sources on patents
Other Databases by Category
- Copyright Databases
- Design and Utility Model Databases
- Trademark Databases
- Commercial Database Suppliers
- Free Science, Medical and Technology Databases
Intellectual Property Legal Status Links
- Mayall's IP Links - Free Patent/Design/TM Status Checks
- INPADOC/Family and Legal Status Kind Codes
"Kind Codes" are the codes each individual country uses to indicate the status of pending, issued or expired patents. Every country has a different series of letters used after patent numbers to communicate the state of a patent document. The INPADOC database provides the international standard kind codes. The above link is a table of kind codes used in the Dialog version of INPADOC.

