SEPTEMBER 21 1872.1 NEW PATENT LAW IN CANADA. FOREIGN PATENTS-A HINT TO PATENTEES. MUNN & C 87 Park Row N. Y. Practical Hints to Mentors. How Can I Obtain a Patent Row Cala I Beast Secure BIY Invention Preliminary Examination. To Blake an Application for a Patent. Caveats. Reissues. Rejected Cases. Trademarks. European Patents. MUNN & CO. 87 Park Row Now York. Index of Inventions For which Letters Patent of the United States were granted BEARING THAT DATE., scientific american, 1872-09-21
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