Excerpt from The Law and Practice Concerning Patents Trade-Marks, (American and Foreign): A Digest of Practical Knowledge for the Inventor, Patentee and Projector Patents are granted in France for a term of fifteen years; the invention must be worked within two years of the date of the patent, and an annual tax of $20 must be paid. If these conditions are not complied with, the patent is rendered invalid. France has a population of forty millions, and is noted for the number and variety of her arts and industries; but many of the processes are carried on by manual labor, which must eventually give way to ingenious machinery, of which, moreover, whether invented at home or abroad, French manufacturers have always shown a strong appreciation. A French patent costs $100 gold. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.