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DATAMP Patents by Date for December 1921
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
61,399,009-D59,926--[datamp][all]
131,399,786----[datamp][all]
201,400,668----[datamp][all]
271,401,469----[datamp][all]