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DATAMP Patents by Date for April 1938
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
52,112,840----[datamp][all]
122,113,623----[datamp][all]
192,114,284----[datamp][all]
262,115,058----[datamp][all]