August 23, 1902
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50 YEARS' l:\I Ufa. EXPERIENCE M K Trade Marks M Bn Designs rfwl"J Copyrights Ac. Anyone sending a sketch and description may quickly 118certain our opinion free whether an invention is probably patentable. (ommunica tiong strictly confidential. Handbook on Patents sent free. Oldest agency for 8ecuring patents. Patents taken through Munn & Co. receive special notice, without charge. in the Scientific American. A handsomely illustrated weekly. Largest circulation ot' any scientific journal. Terms, 13 a rear: fonr month $1. Sold by all newsdealers. MUNN & Co,361 Broadway.New York Branch Office, 625 F St, Washington. D. C.
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