Title: In the United States Patent Office, before the examiner of interferences, Voelker v. Gray, et al., in re., interference cases a, b, c, d, e, f, g, i, j, l, and no. 1 : subject-matter "Telephones."
Authors: Voelker, W. L.; Gray, E.; United States.
Publisher: s.n.,
Year: 1885
Subjects: Gray, E. Trials, litigation, etc.; Voelker, W. L. Trials, litigation, etc.; Telephone Patents United States.; Patent infringement United States.