Z:gnu-www-ja-eldred-amicus--88872a-This reversion is not constitu/en

This reversion is not constitutionally optional. In the context of patents, this Court has described the reversion as a &ldquo;condition&rdquo; that the work subject to temporary statutory monopoly will pass into the public domain upon the patent's expiration. ''Singer Mfg. Co. v. June Mfg. Co.'', 163 U.S. 169, 185 (1896).