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.
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