KTF Tower, 890-20, Daechi-dong, Gangnam-gu, Seoul 135-280, Korea (Tel: +82-2-2016-1202 / Fax +82-2-2016-1458) To: IETF Secretariat (Tel: +1+703-620-9071) From: KTFreetel Co., Ltd. Date: September 3, 2001 Subject: KTFreetel's IPR notice to IETF IPR notice on Internet Draft draft-lee-sgm-support-mobileip.xx.txt IPR notice on Internet Draft draft-lee-xcast-ehternet-xx.txt This is to affirm that KT Freetel Co., Ltd. In accordance with long-established practice, will offer paten licenses for submissions made by it which are adopted or recommended as a standard by your organization as follows: If part(s) of a submission by KT Freetel is(are) included in a standard and KT Freetel has patents and/or pending application(s) that are essential to implementation of such included part(s) in said standard, KT Freetel is prepared to grant - on the basis of reciprocity (grantback) - a license on such included part(s0 on reasonable, non-discriminatory terms and conditions. Please contact: Officer name: Keok-Keun, Oh (Vice President/Policy Coorperation) Email address: osk@ktf.com Address: KTF Tower, 890-20, Daechi-dong, Gangnam-gu, Seoul 135-280, Korea Phone number: +82-2-2016-1202 Fax number: +82-2-2016-1458