Authorities Cited: United States Patent and Trademark Office U.S. Patent No. 3,657,744 U.S. Patent No. 4,739,762 U.S. Patent No. 5,195,984 United States Code 35 U.S.C. § 305 Code of Federal Regulations 37 C.F.R. § 1.552(b) Supreme Court 151 U.S. 586, 606 383 U.S. 1 520 U.S. 461, 465-466 535 U.S. 722 537 U.S. 802 Circuit Courts 524 F.2d 767, 772 796 F.2d 443, 450 939 F.2d 1540, 1544 138 F.3d 1448, 1457 140 F.3d 1449, 1458-1465 166 F.3d 1379, 1383 170 F.3d 1373, 1376 195 F.3d 1322, 1327-1328 212 F.3d 1241, 1252 268 F.3d 1342, 1349 275 F.3d 1371, 1376 334 F.3d 1314 339 F.3d 1352, 1356-1363 363 F.3d 1247, 1261 389 F.3d 1370, 1378 415 F.3d 1303, 1317 418 F.3d 355, 359 460 F.3d 1349, 1364 492 F.3d 1350, 1357 498 F.3d 1373