MESSRS. Munn & CO, Solicitors of Patents, uave had nearly fifty years' continuous experience. Any one way quickly ascertain, free. whether an invention probably is paten table by writing to Munn & Co. Communications strictly confidential. A handbook of patents and bow to obtain them sent free. taken through Munn & Co. receive Bpecial notice in the Seien tint Amerinl1l. This splendid weekly paper, e'egantly illustrated, bus the largest Circulation of any scientific work. f3 a year. Specimen copies free. Address MUNN & CO., New York. 361 Broadway.
This article was originally published with the title "Patents" in Scientific American 73, 25, 399 (December 1895)