U.S. Supreme Court
Hyndman v. Roots, 97 U.S. 224 (1877)
Hyndman v. Roots
97 U.S. 224
This case involves merely questions of fact, and the Court finds that letters patent No. 106,165, granted Aug. 9, 1870, to William G. Hyndman, for an "improvement in rotary blowers," infringe the first, second, third, and fourth claims of reissued letters patent No. 3570, granted July 27, 1869, to P. H. Roots and F. M. Roots, for an "improvement in cases for rotary blowers," upon the surrender of original letters No. 80,010, dated Aug. 11, 1868.
The facts are stated in the opinion of the Court.
The drawings of the machines of the respective parties therein referred to are as follows: