The hair dryer was actually invented in 1890 by Alexander Godefoy, but it didn't go public until 1920 when it was more efficient. Before 1920, women were basically using vacuums to dry their hair. This new invention, even though it overheated easily and was very large, was a big hit for the women. Hand held hair dryers came out in 1951.
Mastervac Mobile Battery Dry Tub Vacuum Cleaner - The Nilco Mastervac Mobile dry tub portable vacuum cleaner is powered by rechargable batteries, this allows the operator complete freedom of movement and also means that even more time can be saved as there is no need to keep stopping to swap a plug to a different power socket.