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DATAMP Patents by Date for May 1920
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
41,338,757----[datamp][all]
111,339,422----[datamp][all]
181,340,320----[datamp][all]
251,340,966----[datamp][all]