Robert Ludwigson
5Patents
4h-index
2Co-inventors
47Inventor score
Filing activity: Oct 30, 1979 → Apr 1, 2008
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7628225B2 | Drilling device | Fixed Constructions | 27 | Active |
| US6247421A | Method for DP-conversion of an existing semi-submersible rig | Performing Operations; Transporting | 12 | Expired |
| US4923527A | Apparatus and method for slag-free cutting of billets and the like | Performing Operations; Transporting | 9 | Expired |
| US4266989A | Cutting tool guiding system for metal cutting machines | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6060679A | Method and apparatus for disposal of edge trim scrap cut from a metal piece | Emerging Cross-Sectional Technologies | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.