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== ER diagram ==
See [http://www.edegan.com/wiki/images/0/06/Patent_Data.png ER Diagram]
== Downloading the files ==
The files (in xml format) for granted patent data can be obtained at [https://www.google.com/googlebooks/uspto-patents-grants-text.html granted patent]
The files for patent application data can be obtained at [https://www.google.com/googlebooks/uspto-patents-applications-text.html patent applications]
The files for maintenance fees data can be obtained at [https://www.google.com/googlebooks/uspto-patents-maintenance-fees.html maintenance]
