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DATAMP Patents by Date for April 1929
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
21,707,499----[datamp][all]
91,708,158----[datamp][all]
161,709,233----[datamp][all]
231,709,912----[datamp][all]
301,710,829----[datamp][all]