One of the assistants who lived in Leonardo's household at the time was a technician and locksmith named Giulio Tedesco, known as Jules the German, who returned to Germany around 1499 and spread Leonardo's idea there. The wheellock came into use in Italy and Germany around that time and proved to be influential in facilitating both warfare and the personal use of guns.18
During his time, Leonardo da Vinci employed a technician and locksmith named Giulio Tedesco, also referred to as Jules the German. Tedesco played a significant role in carrying Leonardo's innovative ideas back to Germany around 1499, contributing to the spread of knowledge and advancements related to firearms.
Around the same period, the introduction of the wheellock mechanism in Italy and Germany marked a pivotal moment in weaponry, enhancing both military applications and personal use of firearms. This technology reflected the transformative impact of Leonardo's influence in the realm of weapons development.
