"Nor does the passage of the 1970 Plant Variety Protection Act support the Government’s position. As the Government acknowledges, sexually reproduced plants were not included under the 1930 Act because new varieties could not be reproduced true-to-type through seedlings. Brief for Petitioner 27, n. 31. By 1970, however, it was generally recognized that true-to-type reproduction was possible and that plant patent protection was therefore appropriate. The 1970 Act extended that protection. There is nothing in its language or history to suggest that it was enacted because § 101 did not include living things. In particular, we find nothing in the exclusion of bacteria from plant variety protection to support the petitioner’s position. See n. 7, supra. The legislative history gives no reason for this exclusion. As the Court of Customs and Patent Appeals suggested, it may simply reflect congressional agreement with the result reached by that court in deciding In re Arzberger, 27 C.C.P.A. (Pat.) 1315, 112 F.2d 834 (1940), which held that bacteria were not plants for the purposes of the 1930 Act. Or it may reflect the fact that prior to 1970 the Patent Office had issued patents for bacteria under § 101. In any event, absent some clear indication that Congress “focused on [the] issues … directly related to the one presently before the Court,” SEC v. Sloan, 436 U.S. 103, 120-121, 98 S.Ct. 1702, 1713, 56 L.Ed.2d 148 (1978), there is no basis for reading into its actions an intent to modify the plain meaning of the words found in § 101. See TVA v. Hill, 437 U.S. 153, 189-193, 98 S.Ct. 2279, 2299-2301, 57 L.Ed.2d 117 (1978); United States v. Price, 361 U.S. 304, 313, 80 S.Ct. 326, 331, 4 L.Ed.2d 334 (1960). Even an abbreviated list of patented inventions underscores the point: telegraph (Morse, No. 1,647); telephone (Bell, No. 174,465); electric lamp (Edison, No. 223,898); airplane (the Wrights, No. 821,393); transistor (Bardeen & Brattain, No. 2,524,035); neutronic reactor (Fermi & Szilard, No. 2,708,656); laser (Schawlow & Townes, No. 2,929,922). See generally Revolutionary Ideas, Patents & Progress in America, United States Patent and Trademark Office (1976)."