Manufacturing research timeline By Teaganfichter 1901 Vacuum cleaner 1901 Steel is invented 1902 First rose bowl game played 1904 John Ambrose Fleming the inventor of the two-electrode radio rectifier 1904 Christian Hulsmeyer He is often credited with the invention of radar 1905 Theo Baekeland invented Velox photographic paper 1906 Radio broadcasting 1907 Electric washing machine 1910 Neon lamp 1913 Ford invents first assembly line 1921 Robots 1931 Electric razor 1946 Microwaves 1950 Credit cards 1969 Internet