United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 607
r less impervious to invisible lightrays. no In testimony whereof I affix my signaturein presence of two witnesses. KICHARD M. CRAIG. [l.s.]Witnesses: G. M. Book,G. H. Shiner. Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.… … WITNESSES ■.
Phonograph · Patents
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