| Patents for Harold J. Siekmann |
Patents 46 -
60
of 64
      |
| Number | Date | Patentee | Title | Type |
| 2,553,984 | May 22, 1951 | H.C. Kemper, H.J. Siekmann | Electric Duplicator Attachment for Lathes | metal lathe accessories and attachments |
| 2,554,721 | May 29, 1951 | G.J. Kasselmann, H.J. Siekmann | Dial Indicating Mechanism | metalworking machine mechanisms |
| 2,558,275 | Jun. 26, 1951 | N.D. Cooper, H.C. Kemper, H.J. Siekmann | Lathe Control Mechanism | machine tool controls |
| 2,561,712 | Jul. 24, 1951 | H.J. Siekmann, G.J. Kasselmann | Adjustable pulley v-belt transmission | metalworking machine mechanisms |
| 2,587,542 | Feb. 26, 1952 | H.J. Siekmann, G.J. Kasselmann | Duplicator attachment for lathes | metal lathe accessories and attachments |
| 2,596,511 | May 13, 1952 | W.R. Meyer, H.J. Siekmann | Crankshaft Lathe Tool Feeding Mechanism | metalworking machine mechanisms |
| 2,623,429 | Dec. 30, 1952 | H.J. Siekmann, W.R. Meyer | Work Handling Appparatus for Machine Tools | metalworking machine mechanisms |
| 2,643,570 | Jun. 30, 1953 | W.R. Meyer, H.J. Siekmann | Multiple Station Center Drive Crankshaft Lathe | metalworking machine mechanisms |
| 2,653,502 | Sep. 29, 1953 | H.J. Siekmann, W.R. Meyer | Work Handling Appparatus for Crankshaft Lathes | metalworking machine mechanisms |
| 2,678,579 | May 18, 1954 | G.J. Kasselmann, H.J. Siekmann | Withdrawal Device for Hydraulic Tracers | metalworking machine mechanisms |
| 2,697,373 | Dec. 21, 1954 | N.D. Cooper, G.W. Luning, G.J. Kasselmann, H.J. Siekmann | Tracer Controlled Facing Lathe | machine tool controls |
| 2,728,254 | Dec. 27, 1955 | G.W. Luning, H.J. Siekmann | Tracer Controlled Lathe Structure | metal lathes |
| D177,350 | Apr. 03, 1956 | W. Okvit, G.J. Kasselmann, H.J. Siekmann | Speed Indicating Plate for Lathe Headstock | engine lathes |
| D177,351 | Apr. 03, 1956 | W.A. Kimsey, R.M. Bacon, H.J. Siekmann | Engine Lathe | engine lathes |
| 2,746,613 | May 22, 1956 | H.J. Siekmann, W.R. Meyer | Work Handling Appparatus for Machine Tools | metalworking machine mechanisms |
