United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 437
move-ments, the axes of which movements inter-sect in the plane of one of said surfaces. WALTER HYER PUMPHREY. Witnesses: C. A. L. Massie,Ralph L. Scott. Copies of this patent may be obtained for five cents each, by addressing the Washington, D. C. Commissioner of Patents, SCOTD REPRODUCING…
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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