| Patents for Harold J. Siekmann |
Patents 31 -
45
of 64
      |
| Number | Date | Patentee | Title | Type |
| 2,348,973 | May 16, 1944 | H.J. Siekmann, W.F. Groene | Spindle Control Mechanism | metalworking machine mechanisms |
| 2,354,009 | Jul. 18, 1944 | H.J. Siekmann, W.F. Groene | Crankshaft Chuck | metal lathe chucks |
| 2,354,010 | Jul. 18, 1944 | H.J. Siekmann, W.F. Groene | Spindle Control Mechanism | machine tool controls |
| 2,450,096 | Sep. 28, 1948 | W.A. Kimsey, H.J. Siekmann | Automatic Step Turning Lathe | metal lathes |
| 2,464,619 | Mar. 15, 1949 | R.M. Bacon, H.J. Siekmann | Headstock Trasmission Control for Lathes | machine tool controls |
| 2,470,304 | May 17, 1949 | W.R. Meyer, H.J. Siekmann, W.F. Groene | Crankshaft Lathe | crankshaft lathes |
| 2,471,162 | May 24, 1949 | W.R. Meyer, H.J. Siekmann | Crankshaft chuck | crankshaft lathes |
| 2,473,108 | Jun. 14, 1949 | H.J. Siekmann, W.R. Meyer | Center Drive Lathe Power Chucking Mechanism | metalworking machine mechanisms |
| 2,489,203 | Nov. 22, 1949 | H.C. Kemper, H.J. Siekmann | Automatic Lathe Feed Mechanism | metalworking machine mechanisms |
| 2,502,792 | Apr. 04, 1950 | H.J. Siekmann, H.C. Kemper | Machine Tool Coolant Guard | metalworking machine mechanisms |
| 2,519,794 | Aug. 22, 1950 | H.C. Kemper, H.J. Siekmann | Hydraulic Gear Shifting Mechanism | metalworking machine mechanisms |
| 2,521,312 | Sep. 05, 1950 | R.M. Bacon, H.J. Siekmann | Indicating and Adjusting Mechanism for Machine Tools | metalworking machine mechanisms |
| 2,523,397 | Sep. 26, 1950 | G.J. Kasselmann, H.J. Siekmann | Change Speed Gearing for Lathe Headstocks | industrial machine gearing |
| 2,525,127 | Oct. 10, 1950 | W.F. Groene, H.J. Siekmann, W.R. Meyer | Hydraulic feed and control mechanism | crankshaft lathes |
| 2,545,053 | Mar. 13, 1951 | G.J. Kasselmann, H.J. Siekmann | Lathe Transmission and Control Mechanism | metalworking machine mechanisms |
