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| Number | Title | Issue Date |
| 6949728 | Impeder for manufacturing welded pipe An impeder, for manufacturing a welded pipe, including an insulating case 4 containing laminations 10 having coated steel sheets 8 formed by providing an insulating coating on untreated steel sheets having a thickness of 0.3 mm or less and an in... | 09/27/2005 |
| 4893972 | Cutting tool The present invention pertains to a cutting tool for removing upset from inside a tube and which does not force splatter into the inside surface of the tube. The cutting tool comprises a holder and means for enabling the tube to move along the holder. The... | 01/16/1990 |
