Harry Brearley
Harry Brearley (18 February 1871 – 14 July 1948) was an English metallurgist, usually credited with the invention of "rustless steel" (later to be called "stainless steel" in the anglophone world).
Edwin Binney
Edwin Binney (November 24, 1866 – December 17, 1934) was an American entrepreneur and inventor, who created the first dustless white chalk, and along with his cousin C. Harold Smith (born London, 1860 - died, 1931), was the founder of handicrafts company Binney and Smith, which marketed his invention of the Crayola crayon.