Patents per Year
Top Inventors at Transworld Drilling All Time
Showing 1–7 of 7 inventors
| Rank | Name | Patents |
|---|---|---|
| 1 | James Ingle | 4 |
| 2 | Olen L. Riggs, Jr. | 3 |
| 3 | John Cox | 2 |
| 3 | Melvin G. Gibson | 2 |
| #5 | Jerry Richmond Johnson | 1 |
| #5 | Keith L. Morrison | 1 |
| #5 | Jeffrey P. Speligene | 1 |
Most Valuable Patents
| Patent | Est. Value | Year |
|---|---|---|
| System for moving drilling module to fixed platform | $13M | 1992 |
| Submersible pipe installation systems | $11M | 1980 |
| System for moving drilling module to fixed platform | $11M | 1991 |
| Method for ballasting a vessel | $10M | 1985 |
| Process for measuring internal metal stress | $10M | 1980 |