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Patents for Harold J. Siekmann
Patents 1 - 15 of 64
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NumberDatePatenteeTitleType
1,744,885Jan. 28, 1930H.J. Siekmann, W.F. GroeneMachine Toolmachine tool controls
RE18,662Nov. 22, 1932H.J. Siekmann, W.F. GroeneMachine Toolmachine tool controls
1,993,994Mar. 12, 1935H.J. Siekmann, W.F. GroeneOrbital Lathemetalworking machine mechanisms
1,993,995Mar. 12, 1935H.J. Siekmann, W.F. GroeneOrbital Lathemetalworking machine mechanisms
2,110,266Mar. 08, 1938H.J. Siekmann, W.F. GroeneCrankshaft Lathemetal lathe chucks
2,113,509Apr. 05, 1938H.J. Siekmann, W.F. GroeneCrankshaft Chuckmetal lathe chucks
2,124,348Jul. 19, 1938H.J. Siekmann, R.M. Bacon, W.F. GroeneHydraulic Lathe Transmissionmetalworking machine mechanisms
2,148,326Feb. 21, 1939H.J. SiekmannCombined Clutch and Brake Devicemetalworking machine mechanisms
2,148,348Feb. 21, 1939W.F. Groene, H.J. SiekmannTurret latheturret lathes
2,148,349Feb. 21, 1939H.J. Siekmann, W.F. GroeneOrbital Lathe Feed Mechanismmetalworking machine mechanisms
2,156,153Apr. 25, 1939W.R. Meyer, H.J. Siekmann, W.F. GroeneMultiple Spindle Vertical Crankshaft Lathecrankshaft lathes
2,191,347Feb. 20, 1940W.F. Groene, H.J. SiekmannCrankshaft lathecrankshaft lathes
2,192,436Mar. 05, 1940W.F. Groene, H.J. SiekmannCenter drive double end turret latheturret lathes
2,192,437Mar. 05, 1940W.F. Groene, H.J. SiekmannSpindle control mechanismmetal lathes
2,221,049Nov. 12, 1940H.J. Siekmann, W.F. GroeneWork Loading Mechanism for Lathescrankshaft lathes
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