US7280033B2_page_1

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United States Patent US007280033B2 (12) (10) Patent No.: US 7,280,033 B2 Berkman et al. (45) Date of Patent: Oct. 9, 2007 (54) SURFACE WAVE POWER LINE 3,810,096 A 5/1974 Kabat et al. COMMUNICATIONS SYSTEM AND 3,846,638 A 11/1974 Wetherell METHOD 4,012,733 A 3/1977 Whyte 4,016,429 A 4/1977…