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).
Massillon, Ohio
Stanley Macomber designed the open-web steel joist in 1921 while working for Massillon's Central Steel Company. Macomber left Central Steel and founded the Massillon Steel Joist Co. in 1923. His open-web steel joist, patented in 1924, was known as the Massillon Steel Joist. Macomber's invention was a revolutionary assembly of steel joists with a top slab used to support of floors, ceilings and roofs. The basis of Macomber's steel joist design is still used today. Stanley Macomber was inducted into the Inventors Hall of Fame in 2011.