Frank E. Hill
3Patents
2h-index
4Co-inventors
41Inventor score
Filing activity: Sep 13, 1972 → Jun 23, 1998
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6026798A | Professional batting training machine | Human Necessities | 31 | Expired |
| US6102021A | Baseball inserter for pitching machines | Human Necessities | 15 | Expired |
| US3981146A | Variable ratio master cylinder | Performing Operations; Transporting | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.