Fred C. Porter
23Patents
11h-index
6Co-inventors
64Inventor score
Filing activity: Sep 11, 1991 → Jun 25, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5644104A | Assembly for permitting the transmission of an electrical signal between areas of different pressure | Electricity | 130 | Expired |
| US5150685A | Apparatus and method for converting conventionally fueled engines to operate on an alternative fuel | Emerging Cross-Sectional Technologies | 43 | Expired |
| US5203305A | Apparatus and methods for converting conventionally fueled engines to operate on an alternative fuel | Emerging Cross-Sectional Technologies | 33 | Expired |
| US6626787B2 | On-demand all-wheel drive system | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| US6578654B2 | Electronically-controlled coupling for all-wheel drive system | Performing Operations; Transporting | 30 | Expired |
| US7125357B2 | Four-wheel drive hybrid vehicle | Emerging Cross-Sectional Technologies | 27 | Expired |
| US6446774B2 | Active control of a hydra-mechanical traction control device | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US6378682B1 | Multi-function control valve for hydraulic coupling | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US6578692B2 | Rear drive module for all-wheel drive vehicle | Emerging Cross-Sectional Technologies | 16 | Expired |
| US6513615B2 | Full-time all-wheel drive power take-off unit for motor vehicle | Performing Operations; Transporting | 15 | Expired |
| US6648785B2 | Transfer case for hybrid vehicle | Emerging Cross-Sectional Technologies | 14 | Expired |
| US6533095B2 | Hydraulic coupling with multi-function control device | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US6672420B2 | Electronically-controlled coupling for all-wheel drive system | Performing Operations; Transporting | 11 | Expired |
| US6814681B2 | On-demand all-wheel drive system | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US6942055B2 | Electronically-controlled rear module for all-wheel drive system | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US6668961B2 | Full-time all-wheel drive power take-off unit for motor vehicle | Performing Operations; Transporting | 8 | Expired |
| US6578685B2 | Active control of a hydra-mechanical traction control device | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US7568568B2 | Hydraulic coupling with disconnect clutch | Mechanical Engineering; Lighting; Heating | 7 | Active |
| US6966396B2 | Electronically-controlled rear drive module for all-wheel drive system | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US7395893B2 | Four-wheel drive hybrid vehicle | Emerging Cross-Sectional Technologies | 4 | Active |
| US7878933B2 | Hydraulic coupling with disconnect pump clutch | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US7004869B2 | Transfer case for hybrid vehicle | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6688446B2 | Rear drive module for all-wheel drive vehicle | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.