551 years ago today, March 19, 1474 (March 2, 1474, the world's first patent law was promulgated. On March 19, 1474, the Republic of Venice promulgated the world's first patent law and issued the world's first patent in accordance with the law. In fact, the patent certificate at that time was that patents first sprouted in the UK. In 1236, King Henry III of England granted a citizen of Bordeaux the privilege of making various colored fabrics for 15 years; in 1331, King Edward III of England granted John Kemp the exclusive right to weave and dye fabrics; In 1367, two watchmakers were licensed to operate. However, the first patent law was first enacted by the Republic of Venice. On March 19, 1474, the Republic of Venice promulgated the world's first patent law, the "Inventor's Law". This law is the basic model and representative of modern patent law. Galileo once obtained the patent for his pumping irrigation machinery in Venice. The British patent system was introduced in 1674, exactly 200 years later. 500 years ago, the double-entry credit accounting method, which is considered to be the most important foundation of capitalism, was created by the Venetian accountant Patchouli. This great innovation was praised by Marx as "the flower of human wisdom". A law passed in 1581 officially approved the establishment of the Venetian Accountants Association. This is also one of the earliest records in the world. The birth of this earliest civil society intermediary organization cannot be overestimated. The Republic of Venice is a Venetian city-state in northern Italy, centered on Venice. It existed from the 9th century until the 18th century. Venice was originally a dependency of the Eastern Roman Empire, gaining autonomy in the 8th century. During the Middle Ages, Venice became very rich because it controlled trade routes and began to expand toward the Adriatic Sea, ruling many islands in the Aegean Sea. The Ottoman Empire gradually declined after rising in the 15th century. In 1797, it was destroyed by Napoleon and became part of the Austrian Empire.