
    Case No. 17,856.
    WILTON v. RAILROAD CO.
    12 Whart. Dig. 408-410.]
    Circuit Court, E. D. Pennsylvania.
    Dec., 1848.
    Patents — Elements of Invention — Specifications—Drawings—Failure to Apply for Patent for 18 Months.
    [1. The principle or essential character of an invention involves two elements: (1) The object attained; (2) the means by which it is obtained, and that, if either of these be new, it may be the subject of a patent.]
    [2. Drawings annexed to a patent issued under the act of 1837 (5 Stat. 191) form no part of the specification, where no drawings were annexed to the original patent.]
    [3. An inventor who does not reduce his invention to practice, or apply for a patent till after 18 months, others in the meantime having invented the same thing, and reduced it to 'prac-' tice, cannot recover for a breach of his patent.]
   [Cited in 2 Whart. Dig. 408-410, to the points above stated. Nowhere reported; opinion not now accessible.]  