This was a suit in equity brought by Robert C. Phillips, Eugene Robinson, and Jesse H. Farwell, who were the exclusive licensees of Phillips for the state of Michigan, to restrain the defendant, the city of Detroit, from infringing letters patent granted to Phillips, December 5, 1871, for 'a new and useful improvement in street and other highway pavements.' The specification and claim of the patent were as follows: 'My improvement consists mainly in the use of wood of any suitable kind in its...
