[ADVICE IN REGARD TO PATENTS.]

The influence of invention on modern life can be very justly estimated by a perusal of “The Progress of Invention in the Nineteenth Century.” It is, of course, well known that inventors are necessarily assisted in the prosecution of their applications for patents in the Patent Office by patent attorneys. It gives Messrs, Munn & Co. pleasure to announce that they have prosecuted, during a period of over fifty years, some of the most important patent cases which have ever been sent to the Patent Office. During this long period they have filed and prosecuted over one hundred thousand applications for patents. Their reputation is such that inventors have found that they may submit their ideas with entire confidence that their trust will not be betrayed, and that their interests will be protected to the fullest extent. They secure patents, trade-marks, caveats and copyrights. A little book entitled “Hand-Book on Patent Practice” will be sent free to any address, and any questions relating to patents will be cheerfully answered by return mail without charge. Thousands of clients all over the United States, many of them the most successful inventors which this country has produced, have had the professional services of Messrs. Munn & Co. in the preparation and prosecution of their patent applications before the United States and foreign patent offices. The integrity of this firm, and their attention to this branch of their business, has resulted in the largest practice of any firm of patent attorneys in the United States. Inventors are invited to write freely regarding their inventions, and their sketches will be carefully and promptly examined. All communications of this kind are treated as strictly confidential. The readers of “The Progress of Invention in the Nineteenth Century” may also be interested to know that Munn & Co. have offices in both New York and Washington, and thus are able to keep in close touch with the work of the Patent Office. They have unsurpassed facilities for examining and reporting on the probable patent-ability of inventions, and they render opinions on questions of infringement and validity of patents; and they also have been most successful in the prosecution of interferences.

Further particulars may be obtained by addressing

MUNN & CO.,

Branch Office:
625 F Street,
Washington, D. C.

SCIENTIFIC AMERICAN OFFICE,
361 Broadway,
New York City.