35 U.S. Code § 273 - Defense to infringement based on prior commercial use
 So in original. Another closing parenthesis probably should precede the comma.
2011—Pub. L. 112–29 amended section generally. Prior to amendment, section related to defense to infringement based on earlier inventor.
Pub. L. 106–113, div. B, § 1000(a)(9) [title IV, subtitle C, § 4303], Nov. 29, 1999, 113 Stat. 1536, 1501A–557, provided that:
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