House cleaning has been an innate human activity forever but only since the early 19th century have mechanical devices replaced the physical labor (performed mostly by women). Mechanical carpet sweepers were replaced by manual suction cleaners, which in turn were replaced by electric vacuum cleaners in the early 20th century. Innovative inventors, who improved vacuum cleaners as electricity became commonly available, made these advances possible. Many early manufacturers failed, but some, such as Bissell, Hoover, Eureka and others, became household names as they competed for global dominance...