Patrick D. Harper
7Patents
6h-index
10Co-inventors
60Inventor score
Filing activity: Sep 15, 1977 → Sep 2, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4234903A | Inductive load driver circuit effecting slow hold current delay and fast turn off current decay | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US4327394A | Inductive load drive circuit utilizing a bi-level output comparator and a flip-flop to set three different levels of load current | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US4225898A | Inductive driver circuit effecting slow and fast current decay | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US4184633A | Bimetal controlled actuator | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US8313282B1 | Compact air-plus-liquid thermal management module | Mechanical Engineering; Lighting; Heating | 7 | Active |
| US4176387A | Inductive drive circuit for setting three different levels of load current including a downshift delay | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US4242729A | Switching control of solenoid current in fuel injection systems | Mechanical Engineering; Lighting; Heating | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.