American inventors should bear in mind that, as a general rule, any invention that is valuable to the patentee in this country is worth equally as much in England and some other foreign countries. Five Patents—American, English, Trench, Belgian and Prussian—will secure an inventor exclusive monoply to his discovery among ONE HLTTOEBD AND THIKTY MILLIONS of the most intelligent people in the world. The f aciltiea of business and steam communication are such that patents can be obtained abroad by our citizens almost as easily as at home. MTINN & Co. have prepared and taken a larger number of European patents than any other American Agency. They have Agents of great experience in London, Paris, Berlin, and other cities. For instructions concerning Foreign Patents, Reissues, Interferences, Hints on Selling Patents, Rules and Proceedings at the Patent Office, the Patent Laws, etc., see our Instruction Book. Sent free by mail on application. Those who receive more than one copy thereof will oblige by presenting it to their friends. Address all communications to MUNN & CO., No. 37 Park Row, New York City Office in Washington, corner of T and 7th streets. Schedule of Patent Office Fees : On filing each Caveat..................................,......................$10 On filing each application for a Patent, (seventeen years).................$15 On issuing each original Patent................................................$20 On appeal to Commissioner of Patents...........r......................, ,. $20 On application for Reissue.....................................................I30 On application for Extension of Patent.......................................#50 On granting the extension......................................................$50 "On iiling a Disclaimer........................................................ $10 On filing application for Design (three and a hair years)....................$10 On filing application for "Design (sven years)__'...........................$15 On filing application for I)csii;ii (iburteen years)............................$3fl In addition to which there arc some small revenue stamp taxes. Residents of Canada and Nova Scotia pay $500 on application.