Authorities Cited: United States Patent and Trademark Office U.S. Patent No. 4,370,766 U.S. Patent No. 4,913,396 United States Code 28 U.S.C. § 1295(a)(4) 35 U.S.C. § 103 Supreme Court 383 U.S. 1, 17 Circuit Courts 740 F.2d 1569, 1571 966 F.2d 656, 659 27 F.3d 551, 553 30 F.3d 1475, 1481 203 F.3d 1305, 1316 239 F.3d 1343, 1351 262 F.3d 1339, 1354 367 F.3d 1359, 1364 442 F.3d 1326 469 F.3d 978, 989