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Patents for John E. Poorman
Patents 1 - 13 of 13
Number	Date	Patentee	Title	Type
2,047,222	Jul. 14, 1936	J.E. Poorman	Tool Holder	lathe tool holders and tool posts
2,188,917	Feb. 06, 1940	J.E. Poorman	Tool Post	lathe tool holders and tool posts
2,206,047	Jul. 02, 1940	J.E. Poorman	Tap and Die Holder	tap and die holders
2,309,668	Feb. 02, 1943	J.E. Poorman	Grinding Machine	surface grinders
2,309,669	Feb. 02, 1943	J.E. Poorman	Grinding Machine	surface grinders
2,343,577	Mar. 07, 1944	J.E. Poorman	Grinding Machine	surface grinders
2,384,044	Sep. 04, 1945	J.E. Poorman	Reversing Mechanism	metalworking speed changing mechanisms
2,579,611	Dec. 25, 1951	J.E. Poorman	Knurling Tool	knurling tools
2,724,302	Nov. 22, 1955	J.E. Poorman	Tool to Be Attached to a Screw Machine or the Like	screw machines
2,870,661	Jan. 27, 1959	J.E. Poorman	Knurling Tool	knurling tools
2,870,662	Jan. 27, 1959	J.E. Poorman	Cross-Slide Knurling or Like Tool	knurling tools
2,875,629	Mar. 03, 1959	J.E. Poorman	Adjustable Off-Center Drill Holder	drill press chucks
2,875,662	Mar. 03, 1959	J.E. Poorman	Cross-slide Form Tool Holder	metalworking machine tool holders

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