Frank H. Johnson
4Patents
3h-index
5Co-inventors
43Inventor score
Filing activity: Feb 12, 1979 → Sep 5, 1991
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4281843A | Tool carrier | Performing Operations; Transporting | 33 | Expired |
| US4341393A | Hand cart | Performing Operations; Transporting | 31 | Expired |
| USD261125S | Hand cart | General | 14 | Expired |
| US5115276A | Magnetic brush development apparatus | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.