John Butwin
8Patents
3h-index
18Co-inventors
50Inventor score
Filing activity: Feb 8, 1999 → Nov 23, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6170506A | Method and circuit for actively cleaning electrohydraulic valves in a hydraulic control valve circuit | Emerging Cross-Sectional Technologies | 18 | Expired |
| US8255130B2 | Closed-loop torque phase control for shifting automatic transmission gear ratios based on friction element load sensing | Mechanical Engineering; Lighting; Heating | 16 | Active |
| US8734293B1 | Accumulator for maintaining hydraulic pressure following an engine restart | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US10006541B2 | Regulator valve with integrated direct acting solenoid | Emerging Cross-Sectional Technologies | 2 | Active |
| US9010374B2 | Regulator valve with integrated direct acting solenoid | Emerging Cross-Sectional Technologies | 2 | Active |
| US8960232B2 | Latch valve for actuating a transmission control element | Emerging Cross-Sectional Technologies | 1 | Active |
| US8490640B2 | Latching pressure regulator | Emerging Cross-Sectional Technologies | 0 | Active |
| US9441732B2 | Regulator valve with integrated direct acting solenoid | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.