>> vacuum cleaners >mainstream since at least the 1950s Canister vacuums date to the 1910s and were probably mainstream by the 1930s (wasn't Herbert Hoover moc

>> vacuum cleaners >mainstream since at least the 1950s Canister vacuums date to the 1910s and were probably mainstream by the 1930s (wasn't Herbert Hoover mocked by connecting him to Hoover Vacuums?) Battery powered vacuums are ubiquitous now and were not in the 1980s (for example the first Dirt Devil model was corded.)