Patents - May 11, 1901
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Anyone sending a sketch and description may quickly ascertain our opinion free wbetneran invention is probably patentable. Communications strictly confidential. Handbook on Patents Bent free. Oldest agency for sec urinepa tents. Patents taken through Munn Co. receive special notice, without charge, in the Scientific flmcrican. A handsomely illustrated weekly. Largest circulation of any scientific journal. Terms. 3 a year ; four months, 1. Sold by all newsdealers. MUNN Co.3B""a.New York Branch Office. 625 P St.. Washington, D. C.
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