Daniel P. Grenn
24Patents
5h-index
47Co-inventors
69Inventor score
Filing activity: Dec 10, 1987 → Jan 11, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5345817A | Misfire detection in internal combustion engines | Physics | 102 | Expired |
| US9047722B2 | Vehicle location and fault diagnostic systems and methods | Physics | 16 | Active |
| US8055400B2 | Control system and method for filtering dependent diagnostic trouble codes | Physics | 9 | Active |
| US4768480A | Engine with spark ignition operation through the oil pressure switch after fuel shutoff | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US6531872B1 | Ignition-off timer diagnostic | Emerging Cross-Sectional Technologies | 7 | Expired |
| US8600605B2 | Distributed diagnostics architecture | Performing Operations; Transporting | 5 | Active |
| US6386021B1 | Oxygen sensor heater service bay test | Emerging Cross-Sectional Technologies | 4 | Expired |
| US7359774B2 | Telematic service system and method | Physics | 4 | Expired |
| US9217765B2 | Method and system for isolating voltage sensor and contactor faults in an electrical system | Physics | 3 | Active |
| US7069911B1 | Apparatus and methods for protecting a catalytic converter from misfire | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US9428073B2 | System and method of monitoring a performance level of a battery | Emerging Cross-Sectional Technologies | 2 | Active |
| US8041478B2 | Securing and diagnosing the vehicle speed input and direction for torque control systems | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US9533549B2 | System and method for controlling heating modes for hybrid electric vehicle (HEV) | Performing Operations; Transporting | 1 | Active |
| US10124679B2 | Method and apparatus for recharging an energy storage device on a vehicle | Emerging Cross-Sectional Technologies | 1 | Active |
| US8670894B2 | Control system and method for sensor signal out of range detection | Emerging Cross-Sectional Technologies | 1 | Active |
| US8838330B2 | Diagnostics for smart sensors of vehicles | Performing Operations; Transporting | 1 | Active |
| US10106042B2 | Methods of operating contactors in high voltage circuits of vehicles | Emerging Cross-Sectional Technologies | 1 | Active |
| US10981557B2 | Battery pack balancing systems and control logic for multi-pack electric-drive motor vehicles | Emerging Cross-Sectional Technologies | 1 | Active |
| US9612289B2 | Detection diagnostic for communication loss between a battery system manager controller and a plurality of battery cell sensing boards | Emerging Cross-Sectional Technologies | 1 | Active |
| US7826963B1 | Diagnostic system for spark ignition direct injection system control circuits | Emerging Cross-Sectional Technologies | 0 | Active |
| US9283947B2 | System and method for determining battery capacity in an electric vehicle | Emerging Cross-Sectional Technologies | 0 | Active |
| US10090125B2 | Methods of determining the order of operating contactors in high voltage circuits | Electricity | 0 | Active |
| US8688318B2 | DC converter diagnostics for vehicles | Emerging Cross-Sectional Technologies | 0 | Active |
| US9830751B2 | System and method for clearing a readiness bit when a control module of a vehicle is reprogrammed | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.