On September 19, 1876 Melville Bissell patented a carpet-sweeper, a mechanical device for the cleaning of carpets. A very early appearance of the product occurs…
Serendipitous Invention – TEFLON On February 4, 1941 Roy Plunkett received a patent for “tetrafluoro-ethylene polymers” (TEFLON). Roy serendipitously invented TEFLON, while working for a…