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Messrs. Munn & Co., in connection with the publication of the SCIENTIFIC AMERICAN, continue to examine Improvements, and to act as Solicitors of Patents for Inventors. In this line of business they have had OVER THIKTY YEAES' EXPERIENCE, and now have unequaled /acuities foi the Preparation of Patent Drawings, Specifications, and the Prosecution of Applications for Patents in the United States, Canada, and Foreign Countries. Messrs. Munn Co. also attend to the preparation of Caveats, Registration of Labels, Copyrights for Books, Labels, Reissues, Assignments, and Report! on Infringements of Patents. All business intrusted to them is done with special care and promptness, on very moderate term.j We send, free of charge, on application, a oamphlet containing further information about Patents, and how to procure them; directions concerning Labels, Copyrights, Designs, Patents. Appeals, Reissues, Infringements, Assignments, Rejected Cases, Hints on the Sale of Patents, etc. Foreiyn Patents.We also send, free of charge, a Synopsis 01 Foreign Patent Laws, showing the costand method of securing patents in all the principal countries of the world. 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 patentsembracing Canadian, English, German, French, and Belgianwill secure to an inventor the exclusive monopoly to his discovery among about ONB HTOJDRED AND FIFTT MILLIONS of the most intelligent people in the world. The facilities of business and steam communication are such that patents can be obtained abroad by oar citizens almost as easily as at home. The expense to apply for an English patent is $75; German, $100; French, $100; Belgian, $100; Canadian, $60. Copies of Patents.Persons desiring any patent issued from 1836 to November SO, 1866, can be supplied with official copies at reasonable cost, the price depending upon the extent of drawings and length of specifications. Any patent issued since November 20,1866, at which time the Patent Office commenced printing the drawings and specifications, may be had by remitting to this office 25 cents. A copy of the claims of any patent issued since 1836 wili be furnished for 25 cents. When ordering copies, please to remit for the same as above, and state name of patentee, title of invention, and date of patent. A pamphlet, containing full directions for obtaining Dnited States patents, sent free. A handsomely bound Reference Book, gilt edges, contains 140 pages and many engravings and tables important to every patentee and mechanic, and is a useful handbook of reference for everybody. Price 25 cents, mailed free. Address MUNN CO,, Publishers SCIENTIFIC AMERICAN, 261 Broadway, New York. BRANCH OFFICE--Corner of F and 7th Streets, Washtoytotk, D. C.
