royalties in the new business. Spangler continued to contribute to the company, patenting numerous further Suction Sweeper designs until his death in 1915, when the company name was changed to the Hoover Suction Sweeper Company, with Spangler's family continuing to receive royalties from his original patent until 1925. Henry Dreyfuss and Hoover In the early 1930s, the company retained the services of Henry Dreyfuss, an up-and-coming industrial designer, to give the Hoover lineup a much needed update. Before Dreyfuss's involvement with the company, the majority of the machines manufactured consisted of a black motor and an aluminum base; this was the norm for more than twenty years. When Hoover introduced the 'Hedlite' in 1932, it was rather awkward and unattractive. Dreyfuss integrated this into the housing of the cleaner, making the machine more aesthetically pleasing and echoing the trends of streamline design. Of Dreyfuss's designs before 1936, he was able to update the basic Hoover machine and keep the company's products relevant with the times. In 1935, he was commissioned to completely redesign the Hoover cleaner. In 1936, for a fee of 25,000 USD, Dreyfuss sold Hoover the design which would become the Model 150 cleaner. For the first time since the introduction of the Hoover vacuum cleaner, the mechanical workings were completely concealed from sight by a Bakelite cover. This cover was a tear-drop styled shell, which seamlessly incorporated the headlight. Also, he totally revamped the base of the machine. Since the release of this design, all Hoover cleaners consisted of a fluid base and a hood to cover the electric motor. These designs suggested efficiency, cleanliness, and speed. Dreyfuss brought excitement and style to an otherwise mundane household appliance. His final design for the Hoover Company was the 1957 Convertible. Development Faced with a total lack of interest by the public in his expensive and unfamiliar new gadget, Hoover placed an ad in The Saturday Evening Post offering customers ten days' free use of his vacuum cleaner to anyone who requested it. Using a network of local retailers to facilitate the offer, Hoover thus developed a national network of retailers for the vacuums. By the end of 1908, the company had sold 372 Model 0s. By 1912, sales had been made to Norway, France, Russia, Belgium, Holland and Scotland. In 1919, Gerald Page-Wood – an art director of Erwin, Wasey & Company, Hoover's advertising agency – came up