United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 817
nsity of said central portionbeyond that of the surrounding portions and 120form an integral sound clarifying disk. In testimony whereof I affix my signature. JOHN A. STEUEEE, . Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington.!). C.…
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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