John C. Freeborn
4Patents
2h-index
2Co-inventors
38Inventor score
Filing activity: Dec 20, 1976 → Oct 11, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5114318A | Automatic-cycling heat-powered fluid pump | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4160157A | Signal transmission circuit with improved digital signal recovery | Electricity | 2 | Expired |
| US11206934B2 | Wall hanger for a skateboard deck | Human Necessities | 1 | Active |
| US4514176A | Automatic teaching apparatus and method | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.