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DATAMP Patents by Date for April 1931
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
71,799,215----[datamp][all]
141,800,264----[datamp][all]
211,801,326----[datamp][all]
281,802,800-D84,049--[datamp][all]