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4 within a year before the effective filing date). Disclosures described in §102(a)(1) are often referred to as “prior art.”

The patent statute in effect before the passage of the AIA included a similar proscription, known as the “on-sale bar”: "“A person shall be entitled to a patent unless– “(a) the invention was known or used by others in this country, or patented or described in a printed publication in this or a foreign country, before the invention thereof by the applicant for patent, or “(b) the invention was patented or described in a printed publication in this or a foreign country or in public use or on sale in this country, more than one year prior to the date of the application for patent in the United States.” 35 U. S. C. §§102(a)–(b) (2006 ed.) (emphasis added)."

The District Court determined that the “on sale” provision did not apply. It concluded that, under the AIA, an invention is not “on sale” unless the sale or offer in question made the claimed invention available to the public. Helsinn Healthcare S. A. v. ''Dr. Reddy’s Labs. Ltd.'', 2016 WL 832089, *45, *51 (D NJ, Mar. 3, 2016). Because the companies’ public disclosure of the agreements between Helsinn and MGI did not disclose the 0.25 mg dose, the court determined that the invention was not “on sale” before the critical date. Id., at *51–*52.

The Federal Circuit reversed. 855 F. 3d 1356, 1360 (2017). It concluded that “if the existence of the sale is public, the details of the invention need not be publicly disclosed in the terms of sale” to fall within the AIA’s onsale bar. Id., at 1371. Because the sale between Helsinn and MGI was publicly disclosed, it held that the on-sale bar applied. Id., at 1364, 1371.

We granted certiorari to determine whether, under the AIA, an inventor’s sale of an invention to a third party