Philip C. Pelfrey
11Patents
5h-index
10Co-inventors
63Inventor score
Filing activity: Nov 10, 1998 → Mar 8, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7445213B1 | Stepped labyrinth seal | Mechanical Engineering; Lighting; Heating | 34 | Active |
| US7431504B1 | High temperature damper for a roller bearing | Mechanical Engineering; Lighting; Heating | 25 | Active |
| US7018079B1 | Aircraft escape slide lighting system | Electricity | 16 | Expired |
| US6053636A | Hydrostatic bearing with compensatory fluid injection | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US7896550B1 | Hydrodynamic liquid metal bearing | Mechanical Engineering; Lighting; Heating | 11 | Active |
| US7544039B1 | Dual spool shaft with intershaft seal | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US8333544B1 | Card seal for a turbomachine | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US10920714B2 | Stable hybrid rocket technology | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US10731605B1 | Monopropellant cascade rocket engine | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US8596960B1 | Turbopump with a tapered hydrostatic bearing | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US8613189B1 | Centrifugal impeller for a rocket engine having high and low pressure outlets | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.