John R. Howatt
8Patents
7h-index
12Co-inventors
60Inventor score
Filing activity: Nov 23, 1973 → Aug 29, 2008
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5077539A | Switching amplifier | Electricity | 152 | Expired |
| US4537067A | Inertial borehole survey system | Fixed Constructions | 87 | Expired |
| US4454756A | Inertial borehole survey system | Fixed Constructions | 49 | Expired |
| US4176396A | Apparatus for directly measuring machine tool wear | Physics | 48 | Expired |
| US4239982A | Fault-tolerant clock system | Electricity | 38 | Expired |
| US4079272A | Optically isolated interface circuits | Electricity | 17 | Expired |
| US3934596A | Shampooing apparatus | Human Necessities | 15 | Expired |
| US8318107B2 | Apparatus and method for specimen suitability testing | Performing Operations; Transporting | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.