Anyone sending a sketch and description may quickly ascertain our opinion free whether an invention is probably patentable. Communications strictly confidential. Handbook on Patents sent free. Oldest agency for securing patents. Patents taken through Mmm & Co. receive special notice, without charge, in the Scientific American. A handsomely illustrated weekly. Largest circulation of any scientific journal. Terms, 3 a year ; four months, 1. Sold by all newsdealers. MUNN & Co.36iB-ad New York Branch Office. S& F St.. Washington, D. C.
This article was originally published with the title "Patents" in SA Supplements 51, 1329supp, 399 (June 1901)