Received April 23, 2002 From: harri.honkasalo@nokia.com This is to advise the IETF that Nokia believes it owns patents and patent applications which may relate to RFC 3095, including: 1) "CID field handling in ROHC": FI 20002100, US 09/954562, PCT/FI01/00819 2) "Variable length context identifier for real time header compression": FI 20002307, US 09/978479, PCT/FI01/00902 3) "Variable length encoding of compressed data": US 09/536638, US 60/164330, PCT/US00/41773 4) "A timer-based scheme for efficient and robust compression of RTP time stamp": US 09/377913, US 09/522363, PCT/US01/07573 5) "Robust and efficient compression of list of items": US 09/756232, US 60/211986, PCT/US01/50525 6) "Using sparse feedback to increase bandwidth efficiency in high delay, low bandwidth environment": US 09/434384, PCT/US00/29846 7) "Header compression in real time services": CN 00803936.4, EP 00905087.3, FI 990335, FI-PAT 108588, JP 2000600378, US 09/505643, PCT/FI00/00107 8) "Using periodic acknowledgements and adaptive coding for maintaining synchronization in error and loss-prone environments": US 09/536639, US 60/159360, PCT/US00/28326 Please refer to http://www.ietf.org/ietf/IPR/NOKIA for more details. Harri Honkasalo Director of IPR, Standards Technology Nokia Corporation email: harri.honkasalo@nokia.com