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Patents for Siegfried Speckert
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
2,155,337	Apr. 18, 1939	S. Speckert	Tool Holder	metalworking machine tool holders
2,210,605	Aug. 06, 1940	S. Speckert	Tool Holder	lathe tool holders and tool posts

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