PowerOasis, Inc. and PowerOasis Networks, LLC (PowerOasis) appeal the United States District Court for the District of New Hampshire’s grant of summary judgment that claims 15, 18, 31, 35, 38, 40, and 49 (asserted claims) of U.S. Patent Nos. 6,466,658 (’658 patent) and 6,721,400 (’400 patent) are invalid as anticipated under 35 U.S.C. § 102(b). In reaching its decision, the district court concluded that none of the asserted claims of the two patents were entitled, under 35 U.S.C. § 120, to the benefit of the filing date of PowerOasis’s original application because the earlier application did not provide a written description of the invention claimed in the asserted patents, as required by 35 U.S.C. § 112. We affirm the grant of summary judgment of invalidity with respect to all asserted claims.