Authorities Cited: United States Patent and Trademark Office U.S. Patent No. 5,486,869 U.S. Patent No. 5,754,250 United States Code 28 U.S.C. § 1295(a)(1) 35 U.S.C. § 112 35 U.S.C. § 119 35 U.S.C. § 120 35 U.S.C. § 282 Code of Federal Regulations 37 C.F.R. § 1.56 Circuit Courts 725 F.2d 1350, 1360 772 F.2d 1570, 1573-1574 802 F.2d 1367, 1375 925 F.2d 1435, 1440 927 F.2d 1565, 1582 935 F.2d 1555, 1560-1564 16 F.3d 1189, 1195 38 F.3d 551, 555-556 52 F.3d 1035, 1038 107 F.3d 1565, 1572 115 F.3d 942, 946 161 F.3d 696, 702-705 228 F.3d 1365, 1378 250 F.3d 1369, 1376-1377 259 F.3d 1364, 1370-1371 299 F.3d 1336, 1343-1344 319 F.3d 1357, 1365-1366 344 F.3d 1205, 1212 394 F.3d 1348, 1352 423 F.3d 1286 437 F.3d 1309, 1314-1316 438 F.3d 1123, 1129 490 F.3d 946, 953 522 F.3d 1279, 1297 522 F.3d 1299 528 F.3d 1365, 1382 537 F.3d 1357, 1365-1367