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DATAMP Patents by Date for April 1820
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
4---X3,189-[datamp] 
6---X3,194-[datamp] 
12---X3,196-[datamp] 
20---X3,197-[datamp] 
21---X3,199-[datamp]