Venetian Patent Statute

On March 19, 1474, the Senate of the Republic of Venice passed a decree that is usually called the first general patent statute. It declared that anyone who made a new and ingenious device not previously built in Venetian territory should register it with the city's magistrates. For ten years nobody else could make a similar device without the inventor's consent, on penalty of a fine of 100 ducats and destruction of the copy. The state kept the right to use any invention for its own needs.¹

Venice was a trading and manufacturing power that lived off skilled crafts. It had long guarded the secrets of Murano glassmaking, which exiled or even threatened artisans who left, and it had granted individual privileges to inventors before. Florence had given the architect Filippo Brunelleschi a three-year monopoly for a river barge in 1421. The 1474 law turned that case-by-case favor into a rule open to any inventor. Printing had reached Venice in 1469, and the new industry showed how profitable a copied idea could be, and how much a city gained by attracting foreign craftsmen with legal protection.¹

The statute treated invention as property that the state would defend in exchange for public benefit, a bargain that remains the core of patent law. Between 1474 and 1550 the Venetian Senate registered several hundred patents, on devices such as mills, pumps and glass processes. The idea spread as skilled migrants carried it north: England issued monopoly letters patent to foreign craftsmen, and the English Statute of Monopolies of 1624 limited them to true inventions for fourteen years, the direct ancestor of British and American patent systems.