How do I do a patent search?

The PTO maintains an online database where you can search for all patents issued since 1976 and all patent applications that have been published since 2001. There are also a variety of commercial services which will allow you to conduct patent database searches - some charge a fee for searches while others are free, such as IBM’s Delphion (although they offer fee-based searches too).

While the internet is a great resource, it is also possible to conduct patent searches “the old fashioned way.” Throughout the country are Patent and Trademark Depository Libraries which contain both a plethora of patent-related materials and reference librarians to assist you in your search through the materials.

Finally, you can also seek the assistance of a patent attorney or a patent agent, who can conduct a refined search based upon the specifics of your invention.