The United States Patent and Trademark Office published the Official Gazette each Tuesday in electronic form only. The Gazette contains bibliographic (front page) text, a representative claim, and a drawing (if applicable) of each patent issued that week. The most recent 52 weekly issues are available to view online.
Classification Systems
Every patent is classified according to one or more classification schemes. The schemes are systems of codes that group inventions according to various technical areas.
This scheme is an extension of the IPC and is managed by the EPO and the US Patent and Trademark Office. CPC includes an additional section "Y" related to new technological developments.
