1856 – Professor Hamilton L. Smith of Gambier, Ohio received the first US patent for the tintype photographic picture process. It described a method for “the obtaining of positive impressions upon a japanned surface previously prepared upon an iron or other metallic or mineral sheet or plate by means of collodion and a solution of a salt of silver.”
1878 – Thomas Edison received a US patent (No. 200521) for the phonograph. His first recording was of “Mary Had a Little Lamb” spoken into a large horn which transmitted vibrations to a needle that cut the recording on a hand-rotated cylinder.
1990 – John and Thomas Knoll launched a small software package for manipulating images meant to be bundled with scanners. It was called Photoshop.
2002 – Odyssey, the first of six current operational Mars vehicles began its mission to map the planet.
2014 – Facebook announced it was acquiring messaging app WhatsApp for $19 billion.
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