
    Case No. 16,836.
    VANCE v. CAMPBELL.
    Patents—Utility—Estoppel by Use.
    The use by a defendant of the plaintiff’s invention, or something substantially like it, es-tops him denying the utility of such invention. The use of the thing patented implies that the party thought it of some utility.
    [Cited in Law’s Pat. Dig. 281, to the point stated above. Nowhere more fully reported; opinion not now accessible.]
     