Dennis E. Calkins
9Patents
4h-index
14Co-inventors
54Inventor score
Filing activity: Mar 31, 1981 → May 22, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4422799A | Method for installing submarine pipelines using a marine railway system | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4838522A | Deepwater subsea lowering/lifting system | Performing Operations; Transporting | 9 | Expired |
| US5951227A | Deep water lowering apparatus | Fixed Constructions | 7 | Expired |
| US4919393A | Deepwater subsea lowering/lifting system | Fixed Constructions | 6 | Expired |
| US4951924A | Deepwater subsea lowering/lifting system | Performing Operations; Transporting | 4 | Expired |
| US6402428B1 | Pipeline recovery tool | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US5513929A | Fixed offshore platform structures, using small diameter, tensioned, well casing tiebacks | Fixed Constructions | 2 | Expired |
| US4775265A | Removable closure device | Fixed Constructions | 1 | Expired |
| US4397582A | Method of creating a cold water conduit to be used in ocean thermal energy conversion systems | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.