The pop-up toaster is patented.
Charles Perkins Strite invented the pop-up bread toaster in 1919, and received a patent for it on October 18, 1920
Betty White predates sliced bread. She was born in 1922, but sliced bread didn't make an appearance at the store until 1928. So that makes her the greatest thing *before* sliced bread.
Locat Trivia: In Philadelphia, the University of Penn includes volleys of toasted white bread sent skyward during their Football Halftime antics. During the song "Drink a Toast to Dear Old Penn", slices of free toast are thrown on the running track reminiscent of midnight showings of The Rocky Horror Picture Show.