TRADE MARKS, DESIGNS, COPYRIGHTS &'0. Anyone sending a sketch and description may quickly ascertain, free, whether an invention ia probably patentable. Communicatiras strictly confidential. Olst ancy for securing patents in America. We have a Washington office. Patents taken through Munn & Co receive special notice in the SCIENTIFIC AMERICAN, beautifully illustrated, largest circulation of s n rn t 8;; mouths. Specimen ce and D BoaK ON PATENTS sent free Address MUNN &; CO., 361 Broadway. New York.
This article was originally published with the title "Patents" in SA Supplements 43, 1109supp, 222 (April 1897)