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Patents for Perley D. Cummings
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
109,591Nov. 29, 1870P.D. CummingsImprovement in machines for making key-boards for wood pavementsspecialty woodworking machines
110,440Dec. 27, 1870P.D. CummingsImprovement in machines for grooving blocks for wood pavementsspecialty woodworking machines
139,457Jun. 03, 1873P.D. Cummings, M. Smith, J.C. JordanImprovement in machines for cutting matchesmatch making machines
145,488Dec. 16, 1873P.D. CummingsGrinding Machinesgrinders
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