The first mechanical clock was invented during the early Renaissance. Improvements were made by Galileo who invented the pendulum in 1581. This invention allowed clocks to be made that were much more accurate. There were also inventions that advanced warfare.Click to see full answer. Also to know is, what inventions were created during the Renaissance? Jan 1, 850. Invention of the Gunpowder. Jan 1, 1300. Invention of the Mechanical Clock. Jan 1, 1456. Invention of the Printing Press. Jan 1, 1496. Invention of the Wallpaper. Jan 1, 1596. Invention of the Flush Toilet. Jan 1, 1608. Invention of the Telescope. Jan 1, 1608. Invention of the Microscope. Jan 1, 1620. Secondly, who invented the first mechanical clock in 1300? Galileo Then, when did we start using clocks? The first mechanical clocks, employing the verge escapement mechanism with a foliot or balance wheel timekeeper, were invented in Europe at around the start of the 14th century, and became the standard timekeeping device until the pendulum clock was invented in 1656.How did they tell the time in the olden days?The sundial is looked on as being a form of sun-powered clock. This shadow clock or sundial permitted one to measure the passage of hours within a day. Another very early form of clock to tell the time was the water clock. The water clock was used by the ancient Greeks.