Keiichi Kai
16Patents
8h-index
29Co-inventors
72Inventor score
Filing activity: Feb 21, 1997 → Nov 15, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8038416B2 | Oil pump pressure control device | Emerging Cross-Sectional Technologies | 85 | Active |
| US7359886B2 | Injection-molding cost estimation system | Physics | 32 | Expired |
| US5823165A | Valve actuator arrangement for internal combustion engine | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US5979405A | Apparatus for controlling a throttle valve electronically in an internal combustion engine | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US6109240A | Apparatus for controlling a throttle valve electronically in an internal combustion engine | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US6000377A | Apparatus for controlling a throttle valve electronically in an internal combustion engine | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6516776B1 | Throttle valve device of engine | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US6332451A | Rotary valve actuator arrangement | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US5907971A | Device for returning reciprocating mechanism to predetermined position | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5964203A | Throttle valve device of internal combustion engine | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US7488163B2 | Trochoid oil pump | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US8616857B2 | Oil pump unit with variable flow rate | Mechanical Engineering; Lighting; Heating | 1 | Active |
| USRE40382E1 | Apparatus for controlling a throttle valve electronically in an internal combustion engine | General | 1 | Active |
| US11679455B1 | Base-integrated blade manufacturing method | Performing Operations; Transporting | 0 | Active |
| US7967585B2 | Method for manufacturing trochoid pump and trochoid pump obtained | Emerging Cross-Sectional Technologies | 0 | Active |
| US9249700B2 | Oil pump unit with variable flow rate | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.