Patents for Stanley P. Rockwell


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Patents for Stanley P. Rockwell
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	1,294,171	Feb. 11, 1919	S.P. Rockwell, H.M. Rockwell	Hardness-tester
	1,516,207	Nov. 18, 1924	S.P. Rockwell	Hardness-testing machine
	1,516,208	Nov. 18, 1924	S.P. Rockwell	Hardness-testing machine
	1,716,796	Jun. 11, 1929	S.P. Rockwell	Dilatometer
	1,864,149	Jun. 21, 1932	S.P. Rockwell	Agitator for hardening baths