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Seattle born Chester Carlson (8 February, 1906–19 September, 1968) excelled in two fields of Electrophotography and Xerography. Since early childhood, he started printing and duplication newspapers and did not like the traditional methods of duplicating writing when he was working in a printing press. In New York, he was made patent attorney. Chester Carlson saw long years of failure before he got noticed by Battelle, who funded him for research and contacted several companies who were then researching on the dry duplication of papers. It was then in the year 1948, that electro-photography was changed to Xerography. The photographic paper manufacturer Haloid was convinced by Battelle, for which a commercial xerography machine was made in 1948. Years after Xerox was made public, the haloids manufactured the first modern photocopier called Xerox 914.
After Carlson had died in 1968, it was years after his death that he was introduced in National Inventors Hall of Fame. The United States Government selected 22 October, 1988, as the recog-nition day for Chester Carlson's day.