Classification Standards and Development

NOTE: If you do not need to read information about searching, go directly to the search system here.

 

Some contents linked to on this page require a plug-in for PDF files.
The Inventors Assistance Center is available to help you on patent matters. Send questions about USPTO programs and services to the USPTO Contact Center (UCC). You can suggest USPTO webpages or material you would like featured on this section by E-mail to the webmaster@uspto.gov. While we cannot promise to accommodate all requests, your suggestions will be considered and may lead to other improvements on the website.