To search the patent databases, see Search for Patents.
Search our patent database.
To find recent ones, patent databases such as those available from the United States Patent and Trademark Office can be useful.
Find out about patent databases and publications on the British Library website - Opens in a new window.
Nevertheless, the nation's patent database proves that there is always someone who believes the sock can be improved.
But now that the agency has put much of its patent database on the Internet, anyone can track down AIDS-related patents.
The Patent Office formally opened a full-text patent database on line in April.
Fang also discovered that some technical inventions which Tang claimed credit were listed in patent databases as having been invented by other people.
Baidu Patent Search is said to be integrated with a patent database which amounts to 2.7 million Chinese patents.
A prior art search may for instance be performed using a keyword search of large patent databases, scientific papers and publications, and on Google.