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DATAMP Patents by Date for April 1917
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
31,221,187-D50,556--[datamp][all]
101,221,844----[datamp][all]
171,222,709----[datamp][all]
241,223,359----[datamp][all]