May 15, 718 - James Puckle, a London lawyer, patented the
world's first machine gun.
May 17, 1839 - Lorenzo Adkins patented a water wheel.
May 18, 1827 - 1830 - Edwin Beard Budding of England signed a
licensing agreement for the manufacture of his invention, the
lawn mower.
May 19, 1896 - Edward Acheson was issued a patent for an
electrical furnace used to produce one of the hardest industrial
substances: carborundum.
May 20, 1830 - D. Hyde patented the fountain pen. 1958 - Robert
Baumann obtained a patent for a satellite structure.