United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 1057
dtungsten. 105 In testimony whereof I have hereuntoaffixed my signature in the presence of thetwo subscribing witnesses. ENGELHAEDT A. ECKHAEDT.Witnesses: Nellie Field,Alice S. Marsh. Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington,… … >H ^
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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