James T. Aumann
16Patents
13h-index
8Co-inventors
71Inventor score
Filing activity: Apr 22, 1974 → Feb 8, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6216804A | Apparatus for recovering core samples under pressure | Fixed Constructions | 36 | Expired |
| US5253720A | Method and apparatus for taking an undisturbed core sample | Fixed Constructions | 35 | Expired |
| US4186569A | Dual spring drill string shock absorber | Fixed Constructions | 35 | Expired |
| US6659204B2 | Method and apparatus for recovering core samples under pressure | Fixed Constructions | 33 | Expired |
| US4256192A | Pressure core barrel | Fixed Constructions | 27 | Expired |
| US3955623A | Subsea control valve apparatus | Fixed Constructions | 27 | Expired |
| US4391328A | Drill string safety valve | Fixed Constructions | 26 | Expired |
| US6378631B1 | Apparatus for recovering core samples at in situ conditions | Fixed Constructions | 25 | Expired |
| US4278138A | Composite heavy metal drill collar | Fixed Constructions | 23 | Expired |
| US6305482A | Method and apparatus for transferring core sample from core retrieval chamber under pressure for transport | Fixed Constructions | 23 | Expired |
| US4577704A | Bearing system for a downhole motor | Emerging Cross-Sectional Technologies | 23 | Expired |
| US6230825A | Apparatus for recovering core samples under pressure | Fixed Constructions | 20 | Expired |
| US4512419A | Coring device with an improved core sleeve and anti-gripping collar | Fixed Constructions | 19 | Expired |
| US4512423A | Coring device with an improved weighted core sleeve and anti-gripping collar | Fixed Constructions | 12 | Expired |
| US4573539A | Hydraulically pulsed indexing system for sleeve-type core barrels | Fixed Constructions | 10 | Expired |
| US4272987A | Pressure core barrel flushing system | Fixed Constructions | 9 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.