[NOVEMBER 4 1871. APPLICATIONS FOE EXTENSION OF PATENTS. How Can I Best Secure My Invention ? Preliminary Examination. Caveats. To Make an Application for a Patent. Re-issues. Trademarks. Design Patents. Rejected Cases. European Patents. 37 Park Row New York. Value of Extended Patents. MUNN A; CO. 39 Park _Kim. How Can I Obtain a Patent ?, scientific american, 1871-11-04
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