Pig bristle was used for cheaper ones, and badger hair for the more expensive ones. The first patent for It was by H. N. Wadsworth in 1857 in the United States, but mass production in the USA only started in 1885. Animal bristle was not an ideal material as it retains bacteria and does not dry well, and the bristles often fell out. Natural animal bristles were replaced by synthetic fibers, usually nylon, by DuPont in 1938. The first nylon bristle was made with nylon yarn, went on sale on February 24, 1938. In January 2003 It was selected as the number one invention Americans could not live without according to the Lemelson-MIT Invention Index. What Product ?
A-Toothbrush
Friday, March 25, 2011
Thursday, March 24, 2011
Q
Q
Prince Carl Philip of Sweden stayed in the mansion during the 2010 FIFA World Cup and singer George Michael lived here last year. Also, Nicolas Cage and his third wife, Alice Kim, stayed here six years ago, while shooting for Lord of War. “The bedroom on the top level has an amazing penthouse feel,” the paper quoted Stefan Antoni, the area’s in-vogue architect and the mansion’s designer. It is known as the "best house in Cape Town”, South Africa, located at the posh Nettleton Road. Who bought it for for $8.4 million ?
A-Vijay Mallya
A-Vijay Mallya
Q
Which Building in Dubai after Completion will be the tallest all residential building ?
A-Princess Tower
A-Princess Tower
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