David E. Hughes
11Patents
8h-index
11Co-inventors
69Inventor score
Filing activity: Nov 28, 1977 → Apr 18, 2007
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4201210A | Veterinary ocular ring device for sustained drug release | Human Necessities | 61 | Expired |
| US5452738A | Crashworthy solenoid actuated valve for CNG powered vehicle | Emerging Cross-Sectional Technologies | 41 | Expired |
| US5562117A | Crashworthy solenoid actuated valve for CNG powered vehicle | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4328020A | Melting glass with reduced NO.sub.x emissions | Emerging Cross-Sectional Technologies | 30 | Expired |
| US5474104A | Refueling check valve for compressed natural gas powered vehicles | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4706929A | Pneumatically operated valve with manual override and lockout | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4776562A | Dual piston pneumatically operated valve | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US4211386A | Slow opening cylinder valve | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US7792265B2 | Call completion service in case of called party unavailability | Electricity | 3 | Active |
| US5125622A | Cylinder valve connection | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US8483126B2 | Multi-network mobile communications systems and/or methods | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.