In the United States v. Jahn case of 1894, the Supreme Court ruled on a dispute involving land ownership in Texas. The U.S government claimed that it owned certain lands under an 1848 treaty with Mexico following the Mexican-American War. However, Charles F. Jahn and others argued they held valid titles to these lands based on Spanish and Mexican grants made before Texas became part of the United States in 1845. The court sided with Jahn, ruling that his title was legitimate because it predated American sovereignty over Texas; thus, he had not needed to present his claim for validation under terms of the treaty or subsequent legislation by Congress as required by US law for later claims.

The United States v. Jahn case does not have a recorded dissenting opinion, nor is it from the year 1894. It appears there may be some confusion regarding the details of this case. The most notable Supreme Court case involving an individual named Jahn is United States v. Jahn from 2003, which was a unanimous decision and therefore did not include any dissenting opinions either.