Section 780.4 - Filing and service of documents(a) All communications regarding proceedings subject to this part should be addressed to: Chairman, Patent Compensation Board, U.S. Department of Energy, 1000 Independence Avenue SW., Washington, DC 20585. All documents offered for filing shall be accompanied by proof of service upon all parties to the proceeding or their attorneys of record as required by law, rule, or order of the Department. Service on the Department shall be by mail or delivery to: Office of Assistant General Counsel for Technology Transfer and Intellectual Property, U.S. Department of Energy, 1000 Independence Avenue SW., Washington, DC 20585.(b) Filing by mail will be deemed to be complete as of the time of deposit in the United States mail.