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DATAMP Patents by Date for April 1821
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
3---X3,321-[datamp] 
5---X3,322-[datamp] 
7---X3,323-[datamp] 
14---X3,324-[datamp] 
16---X3,325-[datamp] 
18---X3,326-[datamp] 
19---X3,327-[datamp] 
23---X3,328-[datamp] 
25---X3,330-[datamp] 
27---X3,331-[datamp]