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Caresse Crosby invented the first modern bra at the age of just 19. She was the first recipient of a patent on bra. Born on April 20, 1891, she was an american person of the arts, poet, publisher, and peace activist.Check Answer
Born on June22, 1899 at St. Paul, Minnesota, he invented the first masking tape in 1923.Check Answer
He was a Scottish engineer and inventor of the world's first practical, publicly demonstrated television system, and also the world's first fully electronic colour television tube. John Logie Baird was born on August 13th, 1888, in Helensburgh, Dunbarton, Scotland and died on June 14th, 1946, in Bexhill-on-Sea, Sussex, England.
Bakelite or polyoxybenzylmethylenglycolanhydride, is an early industrial thermoset plastic that does not change its shape after being mixed and heated. It is formed from an elimination reaction of phenol with formaldehyde, usually with a wood flour filler.
It was developed in 1907 and patented in same year by the Belgian-born American chemist Leo Hendrik Baekeland.
Edwin H. Armstrong is widely regarded as one of the foremost contributors to the field of radio-electronics. He was an American electrical engineer and inventor who invented modern frequency modulation (FM) radio. He was inducted into the National Inventors Hall of Fame in 1980.Check Answer
The German ophthalmologist Adolf Gaston Eugen Fick invented the contact lens. Born in 1852, A.G.E. Fick first performed experiments on rabbit eyes. After that he gave a try to himself and close ones. Then at last he tried it on six of his patients. The results were good. His idea was advanced independently by several innovators in the years that followed.Check Answer
Jacques Cousteau and Emile Gagnan both has the credit of Inventing Aqua-Lung. Aqua-Lung was the original name of regulator or demand valve. It is open-circuit free-swimming underwater breathing set that helps swimmers to breathe in water. It was invented in Paris during the 1942-1943 winter by these two Frenchmen.Check Answer
Born on 9 July 1802 at Williamstown, Vermont, Thomas Davenport was an American Vermont blacksmith who constructed the first American DC electric motor in 1834 and built an electric car in 1835. Based on the concept of battery-powered electric motor, he operated a small model car on a short section of track which provided the way for the later electrification of streetcars.Check Answer
The credit of inventing the first working Escalator goes to Jesse Wilford Reno. He invented it in 1891 and got his patent on March 15, 1892. The Elevator was made in Coney Island, New York City. His invention was referred to as the "inclined elevator." Before him, an another inventor named Nathan Ames patented an escalator machine in March 9, 1859, termed "revolving stairs" but was never built.Check Answer
Elisha Graves Otis Invented a Elevator safety Device(Elevator Brake) which can prevent falling in case a supporting cable breaks. His invention increased the faith in public to use elevators. He worked on this device while living in Yonkers, New York in 1852, and had a finished product in 1854. In 1853, Mr. Otis demonstrated a freight elevator equipped with a safety device.Check Answer