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DATAMP Patents by Date for April 1891
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
7449,666----[datamp][all]
14450,141----[datamp][all]
21450,640----[datamp][all]
28451,022----[datamp][all]