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DATAMP Patents by Date for September 1920
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
71,351,804----[datamp][all]
141,352,512----[datamp][all]
211,353,246----[datamp][all]
281,353,902----[datamp][all]