Stephen L. Jackson
25Patents
11h-index
18Co-inventors
72Inventor score
Filing activity: Jan 4, 1991 → Jul 13, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6298916A | Method and apparatus for controlling fluid flow in conduits | Fixed Constructions | 82 | Expired |
| US8267178B1 | Valve for hydraulic fracturing through cement outside casing | Fixed Constructions | 58 | Active |
| US6691789B2 | Expandable hanger and packer | Fixed Constructions | 42 | Expired |
| US6481496B1 | Well packer and method | Fixed Constructions | 27 | Expired |
| US6860330B2 | Choke valve assembly for downhole flow control | Fixed Constructions | 27 | Expired |
| US7377327B2 | Variable choke valve | Fixed Constructions | 23 | Active |
| US6997266B2 | Expandable hanger and packer | Fixed Constructions | 22 | Expired |
| US6085508A | Rotating lawn mover with a cutter head movable between cutting and mulching positions | Human Necessities | 20 | Expired |
| US7673689B2 | Dual flapper barrier valve | Fixed Constructions | 20 | Active |
| US6269683A | System and method for pressure testing the fittings and seals associated with the communication lines of a well tool | Physics | 13 | Expired |
| US9004180B2 | Method and apparatus for actuating a downhole tool | Fixed Constructions | 12 | Active |
| US6634588B1 | Winch rotator for all terrain vehicles | Performing Operations; Transporting | 11 | Expired |
| US9228404B1 | Slip assembly | Emerging Cross-Sectional Technologies | 9 | Active |
| US7266431B2 | All terrain vehicles (ATVs) and all vehicle (ATV) cautionary light assemblies | Performing Operations; Transporting | 6 | Expired |
| US10400531B2 | Slip assembly | Emerging Cross-Sectional Technologies | 5 | Active |
| US5125488A | Drive assembly having dual neutrality control | Emerging Cross-Sectional Technologies | 5 | Expired |
| US8915300B2 | Valve for hydraulic fracturing through cement outside casing | Fixed Constructions | 5 | Active |
| US6516890B1 | Apparatus and method for preventing the inadvertent activation of the actuating mechanism of a well tool | Fixed Constructions | 4 | Expired |
| US9121251B2 | Valve for hydraulic fracturing through cement outside casing | Fixed Constructions | 3 | Active |
| US6487893B2 | Apparatus and method for pressure testing the sealing engagement of the fittings associated with the communication lines of a well tool | Physics | 1 | Expired |
| US11266361B2 | Method of in vivo monitoring of the condition of an internal surgical repair | Human Necessities | 0 | Active |
| US10376226B2 | Method of in vivo monitoring of the condition of an internal surgical repair | Human Necessities | 0 | Active |
| US11007676B2 | Process for the production of a sulfone polymer agglomerate from the recovery of expanded sulfone polymer | Emerging Cross-Sectional Technologies | 0 | Active |
| US11066532B2 | Process for the production of expanded material based on sulfone polymers | Chemistry; Metallurgy | 0 | Active |
| US12186548B2 | Non-invasive brain stimulation | Human Necessities | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.