Robert E. Hetrick
25Patents
12h-index
17Co-inventors
78Inventor score
Filing activity: Jan 31, 1980 → Mar 3, 2008
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4544470A | Electrochemical photocatalytic structure | Emerging Cross-Sectional Technologies | 86 | Expired |
| US4272329A | Steady state mode oxygen sensor and method | Physics | 71 | Expired |
| US4806859A | Resonant vibrating structures with driving sensing means for noncontacting position and pick up sensing | Physics | 53 | Expired |
| US4887032A | Resonant vibrating structure with electrically driven wire coil and vibration sensor | Physics | 53 | Expired |
| US5771873A | Carbonaceous deposit-resistant coating for engine components | Mechanical Engineering; Lighting; Heating | 48 | Expired |
| US4272331A | Oscillatory mode oxygen sensor and method | Physics | 38 | Expired |
| US6096149A | Method for fabricating adhesion-resistant micromachined devices | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4272330A | Transient mode oxygen sensor and method | Physics | 26 | Expired |
| US6145763A | Carbonaceous deposit-resistant coating for fuel injectors | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US6404028B1 | Adhesion resistant micromachined structure and coating | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5725151A | Electrospray fuel injection | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US5671716A | Fuel injection system and strategy | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US4739664A | Absolute fluid pressure sensor | Physics | 12 | Expired |
| US4841934A | Oxygen pumping device for control of the air fuel ratio | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US4615772A | Electrochemical gas sensor | Physics | 6 | Expired |
| US4396466A | Absolute pressure sensor | Physics | 6 | Expired |
| US5275712A | Wide range workfunction based A/F sensor | Physics | 6 | Expired |
| US5000050A | Mass-flow sensor using aerodynamic damping | Physics | 6 | Expired |
| US4381224A | Step function lean burn oxygen sensor | Physics | 5 | Expired |
| US5389224A | Capacitive A/F sensor | Physics | 4 | Expired |
| US4435742A | Electrochemical transistor structure with two spaced electrochemical cells | Electricity | 4 | Expired |
| US4332003A | Electrochemical analog transistor structure with two spaced solid electrochemical cells | Electricity | 3 | Expired |
| US5310474A | Workfunction based A/F sensor | Physics | 3 | Expired |
| US7691602B1 | Agricultural screening system and method for detection of infectious microorganisms | Physics | 1 | Active |
| US8857279B2 | Analyte screening and detection systems and methods | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.