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Patents for Hart Mfg. Co.
Patents 1 - 6 of 6
First set of recordsLast set of records
NumberDatePatenteeTitleType
41,742Feb. 23, 1864H.K. JonesImprovement in Machines for Stamping Carpenters' Squarestool making machines
126,307Apr. 30, 1872H.K. JonesImprovement in Marking Carpenter Squaresmaking squares
147,008Feb. 03, 1874H.K. JonesImprovement in Machines for Marking Carpenters' Squarestool making machines
925,100Jun. 15, 1909L.F. HartScrew Cutting Devicetap and die holders
925,181Jun. 15, 1909L.F. HartScrew Cutting Devicetap and die holders
962,024Jun. 21, 1910L.F. HartScrew Cutting Devicepipe threading machines
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