ERW Patents

United States - Patent Numbers
US 6,701,985 B2, US 7,104,297 B2, US 61/081,249, US 87503-824744, US 87503-819089, US 12/503,396

China - Patent Numbers
CN03817173.2, CN100546840C

Japan - Patent Numbers
JP 4664672

WO 2010/009329, PCT/US2009/050871