Vacuum cleaner
The vacuum cleaner evolved from the carpet sweeper via manual vacuum cleaners. The first manual models, using bellows, were developed in the 1860s, and the first motorized designs appeared at the turn of the 20th century, with the first decade being the boom decade.
James M. Spangler
Despite being primitive and unwieldy, it worked—Spangler's asthma abated, and he received a patent for his troubles. He also realized that he might finally have a salable invention. Spangler first tested his invention in 1907. During the next year, he refined the vacuum numerous times, and on June 2, 1908, he received a patent for his sweeper.