![[Image: 7VSrQ.png]](http://i.imgur.com/7VSrQ.png)
In 1859,
Elevator is patented.
![[Image: yRDiP.jpg]](http://i.imgur.com/yRDiP.jpg)
![[Image: mbosK.jpg]](http://i.imgur.com/mbosK.jpg)
elevator is granted by the government for the invention .
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In 1925,
David Albert Huffman was born in U.S. state of Ohio.
![[Image: N90H6.jpg]](http://i.imgur.com/N90H6.jpg)
He is the Pioneer in computer science, known for his Huffman coding.and He was also one of the pioneers in the field of mathematical origami..
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In 1927,
Marvin Minsky was born in in New York City, USA
![[Image: 6H3GT.jpg]](http://i.imgur.com/6H3GT.jpg)
![[Image: hYoUH.png]](http://i.imgur.com/hYoUH.png)
He was the American cognitive scientist in the field of artificial intelligence (AI) and the author of several texts on AI and philosophy.and he is the Co-founder of Massachusetts Institute of Technology's AI laboratory.
He invented the first head-mounted graphical display (1963) and the confocal microscope (1957, a predecessor to today's widely used confocal laser scanning microscope).