Dear Steve Donovan: An IPR disclosure that pertains to your RFC entitled "Session Initiation Protocol PSTN Call Flows" (RFC3666) was submitted to the IETF Secretariat on 2010-10-04 and has been posted on the "IETF Page of Intellectual Property Rights Disclosures" (https://datatracker.ietf.org/ipr/1414/). The title of the IPR disclosure is "Hitachi, Ltd.'s Statement about IPR related to RFC 3666 (2)."
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