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DATAMP Patents by Date for April 1857
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
716,964RE447---[datamp][all]
1417,017RE448---[datamp][all]
2117,072----[datamp][all]
2817,141RE458---[datamp][all]