What are 4 new inventions designs or ideas of the 1780's?

In the 1780s, several notable inventions emerged, including the steam engine improvements by James Watt, which significantly enhanced efficiency and laid the groundwork for the Industrial Revolution. The invention of the mechanical keyboard by Christopher Latham Sholes introduced a more efficient way to type. Additionally, the design of the cast iron bridge by Thomas Telford revolutionized civil engineering by combining strength and aesthetic appeal. Lastly, the invention of the modern safety pin by Walter Hunt provided a practical solution for fastening clothing.