http://portal.uspto.gov/pair/PublicPair

The Patent Electronic Business Center (EBC) assists customers with electronic patent application submissions via the Electronic Filing System (EFS-Web) and with the review of patent applications in Public and Private PAIR. The EBC offers online electronic filing information, instructional material, PatentIn and Checker support and is available to assist users through one-on-one support during its normal business hours. The EBC also serves as a liaison in directing customers to other USPTO organizations that can address their specialized business issues and needs.