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| Patents for B23D 21 - Machines or devices for shearing or cutting tubes (3,019) |
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| 11/16/1976 | US3991642 Turret press | | 10/26/1976 | US3987523 Apparatus and method for forming end surfaces on annular work pieces | | 10/12/1976 | US3985051 Apparatus for cutting and grooving a pipe | | 08/31/1976 | US3977076 Internal pipe cutting tool | | 06/29/1976 | US3965572 Tube cutter | | 05/25/1976 | US3958467 Method for making die jaw inserts for tube cutoff machines | | 05/25/1976 | US3958329 Cast iron pipe cutter | | 05/18/1976 | US3957386 Corrugated tubing perforating machine | | 05/11/1976 | US3955453 Cutting of metals by shearing | | 05/04/1976 | US3953993 Multiple size culvert pipe rolling machine | | 04/13/1976 | US3949632 Tube cut-off machine | | 03/30/1976 | US3946487 Tools for cutting | | 03/23/1976 | US3945276 Method for removing waste disposers | | 03/16/1976 | US3943626 Pipe cutter | | 03/09/1976 | US3942248 Pipe cutting device | | 02/24/1976 | US3939561 Pipe cutting mechanism | | 02/17/1976 | US3938415 Tube cutoff apparatus | | 01/20/1976 | US3933090 Tube cutting apparatus | | 01/20/1976 | US3932937 Tool for cutting and graduating of plastic tubes |
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