Subject: [Sip] AT&T IPR Statement

From: "Frost, Thomas F (Tom), ALIPM" <[email-masked]>
Date: Fri, 1 Feb 2002 08:58:07 -0500

This declaration is being made pursuant to the provisions of IETF IPR Policy, Sections 10.3.1 and 10.3.2.

This is to advise the IETF that AT&T believes it owns intellectual property that may relate to Internet Draft document " draft-ietf-sip-rfc2543bis-06", including United States Patent No. 6,324,279.  To the extent that the technology discussed in this Internet Draft becomes an IETF Standard, and to the extent claims of AT&T's patents are required to implement the IETF Standard, AT&T agrees that, upon written request, AT&T will offer, on a nondiscriminatory basis, non-exclusive licenses on fair and reasonable terms
under such patent claims to implement that IETF Standard. AT&T's willingness to grant such licenses is conditioned upon the prospective licensee granting a reciprocal license to AT&T under any patents that the prospective licensee has to any technology required to implement that IETF Standard. 

> Written requests for licenses may be sent to:
> 
> AT&T Intellectual Property Licensing
Intellectual Property Vice President
> 180 Park Avenue
> Florham Park, NJ 07932

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