Joseph McKenna, Russell v. United States (182 U.S. 516…
“ No contract therefore based on the action of that office can be claimed. If petitioners have suffered injury it has been through the infringement of their patent, not by a breach of contract, and for the redress of an infringement the court of claims has no jurisdiction. This doctrine may be technical. If the United States was a person, on the facts of this record (assuming, of course, the petition to be true) it could be sued as upon an implied contract, but it is the prerogative of a sovereign not to be sued at all without its consent or upon such causes of action as it chooses. ”
