Received February 22 From: "Hans [ISO-8859-1] Sjöstrand" In order to allow the widest possible use of NAT traversal technology, Interactive People Unplugged AB (ipUnplugged) presents the following statement regarding its patents and patent applications relating to NAT traversal. ipUnplugged hereby makes it known that it will not assert any claims in any patents issued in any country based on - the US patent application 09/742,443 or any patent application listing the same as a priority application, against any party that makes, uses, sells, imports, or offers for sale a conforming implementation of an IETF standards-track specification of an Mobile IP NAT traversal module. This statement is limited in that ipUnplugged does not give any rights to incorporate NAT traversal technology covered by patents of ipUnplugged in implementations for any other protocols other than the IETF standards-track Mobile IP protocol. This statement is limited in that ipUnplugged retains the right to assert said patents against any party and any subsidiary of a party that asserts a patent it owns or controls, either directly or indirectly, against ipUnplugged or any of its subsidiaries or successors in title for any implementation of or operation of any software or system implementing technology specified by the IETF. ipUnplugged also retains the right to claim damages for any prior use by such a party of NAT traversal technology covered by patents of ipUnplugged. For a written agreement confirming this statement contact Hans Sjöstrand ipUnplugged Arenavägen 33 SE-121 28 Stockholm SWEDEN