50 YEARS EXPERIENCE TRADE MARKS DESIGNS COPYRIGHTS &C. Anyone sending a eketch and descrintion may quickly ascertain our opinion free whether an invention is probably patentable. Communloa-tiona strictly confidential. Handbook on Patents sent Iree. Oldest ajrenoy ior securing patents. Patents taken through Munn & Co. receive special notice, without chariie, in the Scientific American A handsomely illustrated weekly. Largest clr-calation of any ecientiflc Journal. Terms, 13 a year ; four months, $1. Sold by all newsdealers. MUNN Co.36>Br..w.y. New York BnDcbOffloa.S6Fet. WMhii)etoD.It,C.
This article was originally published with the title "Patents" in SA Supplements 53, 1382supp, 459 (June 1902)