Robert Jancha
6Patents
5h-index
6Co-inventors
52Inventor score
Filing activity: Nov 1, 2001 → Aug 3, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6666271B2 | Curved flapper and seat for a subsurface saftey valve | Fixed Constructions | 21 | Expired |
| US6851477B2 | Curved flapper with angle variant seat for a subsurface safety valve | Fixed Constructions | 15 | Expired |
| US7798235B2 | Safety valve torsional spring assembly and method | Emerging Cross-Sectional Technologies | 11 | Active |
| US6854519B2 | Subsurface valve with system and method for sealing | Fixed Constructions | 9 | Expired |
| US9133688B2 | Integral multiple stage safety valves | Fixed Constructions | 9 | Active |
| US8701781B2 | Subsurface safety valve flapper | Fixed Constructions | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.