Patents for John R. Johnson


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Patents for John R. Johnson
Patents 1 - 6 of 6
Number	Date	Patentee	Title	Type
1,139,422	May 11, 1915	J.R. Johnson	Milling-Machine	milling machines
1,143,584	Jun. 15, 1915	J.R. Johnson	Milling-Machine	milling machines
1,143,585	Jun. 15, 1915	J.R. Johnson	Milling-Machine Spindle-Head	milling machines
1,153,165	Sep. 07, 1915	J.R. Johnson	Milling-Machine	milling machines
1,254,044	Jan. 22, 1918	J.R. Johnson	Work-support	milling machines
2,012,047	Aug. 20, 1935	J.R. Johnson	Boring Head	boring heads