Johnston v. Woodbury

GILBERT, Circuit Judge.

The appeal in this case is taken from the final decree of the circuit court dismissing the appellant’s bill in a suit brought for infringement of claims 1 and 2 of letters pal ent Xo. 490,819, granted to the appellant on January 31, 1893, for an “improvement in ore concentrators.” The bill was dismissed afier a hearing on the pleadings and proofs upon the ground that the patent sued upon was void for want of invention. Johnston v. Woodbury (C. C.) 96 Fed. 421. The appellant’s invention relates to die class of machines known as “endless-belt concentrators,” extensively…