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Patents for Harold J. Siekmann
Patents 1 - 15 of 50
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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, 1938W.F. Groene, H.J. SiekmannCrankshaft 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
2,148,349Feb. 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
2,221,049Nov. 12, 1940H.J. Siekmann, W.F. GroeneWork Loading Mechanism for Lathescrankshaft lathes
2,232,226Feb. 18, 1941W.R. Meyer, H.J. Siekmann, W.F. GroeneCrankshaft Lathemetal lathe chucks
2,232,324Feb. 18, 1941H.J. Siekmann, W.F. GroeneOrbital Lathemetalworking machine mechanisms
2,264,458Dec. 02, 1941H.J. SiekmannVertical Crank Pin Lathecrank pin lathes
2,267,696Dec. 23, 1941H.J. Siekmann, W.F. GroeneBlacklash Eliminator for Orbital Lathesmetalworking machine mechanisms
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