Robert Campbell
6Patents
5h-index
17Co-inventors
60Inventor score
Filing activity: Mar 22, 1999 → Apr 26, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6518686B2 | Electric motor including unitary brush card bushing holder | Electricity | 24 | Expired |
| US6707177B1 | Lubrication recirculation and wear protective member for electric motor | Electricity | 14 | Expired |
| US6159118A | Horizontally disposed bicycle derailleur | Performing Operations; Transporting | 11 | Expired |
| US6880231B2 | Electric motor and method for reducing end play | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6842966B1 | Electric motor and method for reducing end play | Emerging Cross-Sectional Technologies | 8 | Expired |
| US11754316B2 | Providing domestic hot water from conventional residential split system heat pumps | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.