USPQ2d 1936, 1938 (Fed.Cir.1993) (“It is improper for a court to add ‘extraneous’ limitations to a claim, that is, limitations added wholly apart from any need to interpret what the patentee meant by particular words or phrases in the claim.”) (quoting E.I. du Pont de Nemours & Co. v. Phillips Petroleum Co., 849 F.2d 1430, 1433, 7 USPQ2d 1129, 1131 (Fed.Cir.1988)); see also Specialty Composites v. Cabot Corp., 845 F.2d 981, 987, 6 USPQ2d 1601, 1605 (Fed.Cir.1988) (“Where a specification does not require a limitation, that limitation should not be read from the specification into the claims.”) (citing Lemelson v. United States, 752 F.2d 1538, 1551-52, 224 USPQ 526, 534 (Fed.Cir.1985)); cf. Constant v. Advanced Micro-Devices, Inc., 848 F.2d 1560, 1571, 7 USPQ2d 1057, 1065 (Fed.Cir.1988) (<HOLDING>). The other clear point provided by these two
recognizing that the court must give meaning to all the words in the claims recognizing that we must give meaning to all the words in the claims holding that limitations from the specification should not be read into the claims holding that the written description provided no evidence to indicate that   limitations must be imported into the claims to give meaning to disputed terms holding that courts must generally give effect to the plain meaning of a statute because that is the best evidence of the legislatures intent