DoCoMo USA Labs' statementabout IPR claimed in draft-kempf-mobopts-ringsig-ndproxy-00.txt Date: 3 August 2005 From: Toshiro Kawahara * DoCoMo Communications Laboratories USA, Inc. (DoCoMo USA Labs) will not assert its US Patent or its non-US counterpart against any party that implements draft-kempf- mobopts-ringsig-ndproxy-00.txt or any derivative, when this is employed as a standard. This grant of rights will terminate with respect to any party that asserts a patent it owns, directly or indirectly, against DoCoMo USA Labs and affiliates for their implementation and operation in compliance with this technology or any derivative. This termination will occur as of the date the patent is asserted against DoCoMo USA Labs and affiliates. With best regards, Toshiro Kawahara Senior Vice President DoCoMo Communications Laboratories USA, Inc. kawahara@docomolabs-usa.com Tel: +1-408-451-4716 FAX: +1-408-573-1090 181 Metro Drive, Suite 300 San Jose, CA 95110