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 MUNUN &; Co. receive Special Notice, without charge, in the Scientific American' A handsomely Illustrated weekly. Largest circulation of any scientific journal. Terms, 93 a .year;. four months, &1 Sold, by .all newsdealers. MUNN CO.361 Broadway NewYork Branch Office, 6616 Ir St., Washington, D. C.
This article was originally published with the title "Patents" in SA Supplements 56, 1446supp, 211 (September 1903)