詹姆斯·瓦特
In 1780 James Watt obtained a patent for letter copying presses, which James Watt &amp; Co. produced beginning in that year. Letter copying presses were used by the early 1780s by the likes of Benjamin Franklin, George Washington, Henry Cavendish, and Thomas Jefferson. In 1785, Jefferson was using both stationary and portable presses made by James Watt &amp; Co.