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Patents for Stanley P. Rockwell
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
1,516,207	Nov. 18, 1924	S.P. Rockwell	Hardness-testing machine	metal hardness testers
1,516,208	Nov. 18, 1924	S.P. Rockwell	Hardness-testing machine	metal hardness testers

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