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DATAMP Patents by Date for April 1864
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
542,200----[datamp][all]
1242,271----[datamp][all]
1942,336RE1,653---[datamp][all]
2642,467RE1,661---[datamp][all]