Toshio Ohnishi
6Patents
3h-index
16Co-inventors
43Inventor score
Filing activity: Jan 31, 1997 → Jan 16, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6006789A | Method of preparing a steel pipe, an apparatus thereof and a steel pipe | Performing Operations; Transporting | 20 | Expired |
| US5942132A | Method of and apparatus for producing steel pipes | Performing Operations; Transporting | 9 | Expired |
| US6216511A | Apparatus and method for smoothing a welded seam of steel pipe | Performing Operations; Transporting | 9 | Expired |
| US6216940A | Pipe forming roll apparatus and method | Performing Operations; Transporting | 3 | Expired |
| US6375059B2 | Method for smoothing steel pipe seam portion | Performing Operations; Transporting | 3 | Expired |
| US6041632A | Pipe forming roll apparatus and method | Performing Operations; Transporting | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.