| | Book | Requires cookie* | | 1 | Title: | Testimony in the case of an interference between Benjamin Hershey and John Henry Helm, for a patent for a link welding machine
| | | | Creator: | Hershey, Benjamin. | | | | | Helm, John Henry | | | | | Holmead, J. E. F. | | | | | Christy, George H. | | | | Publication: | s.n, Pittsburgh, Pa,1875] | | | | Notes: | Cover title. J.E.F. Holmead, attorney for Benjamin Hershey; George H. Christy, attorney for Helm. | | | | Call #: | Pam. Z1041 | | | | Extent: | 27 p. ; 23 cm. | | | | Subjects: | Hershey, Benjamin. -- Trials, litigation, etc | Helm, John Henry -- Trials, litigations, etc | Patent suits -- Pennsylvania -- Pittsburgh | Welding -- Equipment and supplies -- Patents
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