Today in Tech History – November 11, 2017

Today in Tech History logo1675 – Gottfried Leibniz demonstrated integral calculus for the first time to find the area under the graph of good ol y=f(x). That is, if you believe what he wrote in his notebooks.
http://books.google.com/books?id=bOIGAAAAYAAJ&pg=PA213&lpg=PA213&dq=november+11+1675+leibniz&source=bl&ots=U_y9jNxYoF&sig=BIPDX5dry5lv_bLJUXmLTelcDIg&hl=en#v=onepage&q=november%2011%201675%20leibniz&f=false

1930 – Albert Einstein, yes that Albert Einstein and Leo Szilard received a US patent for a refrigerator that required no electricity, just a heat source. Electrolux bought up the patents.
http://www.google.com/patents?id=t0BRAAAAEBAJ&printsec=abstract&zoom=4#v=onepage&q&f=false

2006 – The Sony PS3 went on sale with a built-in Blu-ray player and hard drive.

http://www.gettyimages.com/detail/news-photo/playstation-3-in-akihabara-japan-on-november-11-2006-the-news-photo/110832129#playstation-3-in-akihabara-japan-on-november-11-2006-the-playstation-picture-id110832129

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