John H. Spence
3Patents
3h-index
3Co-inventors
39Inventor score
Filing activity: Oct 7, 1976 → Apr 5, 1984
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4630547A | Cross bearer arrangement for slotted center sill | Performing Operations; Transporting | 24 | Expired |
| US4082045A | Stability bracing for twist on high gondolas or hopper cars | Performing Operations; Transporting | 21 | Expired |
| US4206710A | Railway car center plate filler arrangement | Performing Operations; Transporting | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.