The following was received from Alan ONeill on December 5, 1997 Subject: Patent application disclosure IETF colleagues, In accordance with the IETF "Rules" (Section 10.3.1 - 6), BT would like to disclose that we have recently applied for a patent relating to the support of IP differential QoS. BT does so in the belief that this recent patent application is relevant to present discussions within the IETF. Alan O'Neill, BT Labs.