Sahil Gupta

Sahil is the CEO at Sawan Books. He pursued his Bachelor’s Degree in Bussiness from the University of Chicago, USA and currently working on his ultimate goal - ‘To see a book in every child’s hand.’ .

Where was the Helicopter Invented?

The helicopter is the only aircraft that can move forward, backward, side-to-side and hover. The VS-300 was the world’s first practical helicopter that took flight at Stratford, Connecticut, on September 14, 1939. The first helicopter was designed by Igor Sikorsky and built by the Vought-Sikorsky Aircraft Division of the United Aircraft Corporation. It took 29

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Where was the First Refrigerator Invented?

The process of the Invention of the refrigerator started in the 18th century. In 1748, William Cullen of the University of Glasgow developed a process for creating an artificial cooling medium. An American inventor Oliver Evans designed the first refrigerator in 1804. In 1843, Jacob Perkins built the first refrigeration machine in Great Britain. In

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Where was the First Printer Invented?

In 1938, Chester Carlson, an American physicist and inventor, invented a dry printing process called ‘electro photography’. It is commonly called a ‘Xerox’. In 1953, the first high-speed printer was developed by Remington-Rand for use on the Univac computer. In 1969, the original laser printer, called EARS, was developed at the Xerox Palo Alto Research

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