Frederick N. Trofimenkoff
10Patents
6h-index
13Co-inventors
63Inventor score
Filing activity: Sep 18, 1978 → Dec 23, 2003
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4235050A | Skate sharpening apparatus | Performing Operations; Transporting | 48 | Expired |
| US6209632A | Subsurface signal transmitting apparatus | Fixed Constructions | 40 | Expired |
| US6405795B2 | Subsurface signal transmitting apparatus | Fixed Constructions | 32 | Expired |
| US5909132A | Resistance bridge and its use in conversion systems | Physics | 14 | Expired |
| US6672383B2 | Subsurface signal transmitting apparatus | Fixed Constructions | 8 | Expired |
| US5877637A | Resistance bridge and its use in conversion systems | Physics | 7 | Expired |
| US4558301A | Voltage-to-frequency and analog-to-digital converter circuit | Electricity | 6 | Expired |
| US4827261A | Clock-controlled pulse width modulator | Electricity | 5 | Expired |
| US4847620A | Clock-controlled voltage-to-frequency converter | Electricity | 4 | Expired |
| US7093680B2 | Subsurface signal transmitting apparatus | Fixed Constructions | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.