History for IPR disclosure
AT&T's patent claim pertaining to draft-mogul-http-delta

From: http://www.ietf.org/ietf-ftp/IPR/ATT-MOGUL-HTTP-DELTA

The following was received February 23, 2001
From: "Frost, Thomas F (Tom), ALCOO"

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 at least one patent
that may relate to Internet Draft document "draft-mogul-http-delta-07.txt",
including United States Patent No. 5,931,904.  To the extent that the
technology discussed in that 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, royalty-free licenses 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
Room 2E37, Bldg. 104
180 Park Avenue
Florham Park, NJ 07932