Earle v. Sawyer

STORY, Circuit Justice.

The plaintiff, on the 28th of December, 1822, procured letters patent for “a new and useful improvement in the machinery for manufacturing shingles, called the ‘shingle mill,’ ” and filed a specification in the patent office, a copy of which, with the explanatory drawings and figures referred to therein, is annexed to the letters patent In this specification, he describes his invention as follows: “Said improvement consists in such new arrangement and change of parts of my former machine for the like purpose; for which letters patent were granted to me by the president…