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Ely Griswold Patent – Hydraulic Pump Regulator, 1908

Ely Griswold Patent – Hydraulic Pump Regulator, 1908

Applied Dec. 12, 1906, granted Jan. 28, 1908. Patent #877,563

This patent was not assigned to the Griswold Mfg. Co., so I am not sure that this is product that was used in the plant.

ElyGriswoldHydraulicPumpRegulatorPatent

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