Donald A. Walker
5Patents
4h-index
7Co-inventors
50Inventor score
Filing activity: Dec 10, 1976 → Dec 31, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8618941B2 | Systems and methods of interaction with water usage information | Electricity | 37 | Active |
| US4375339A | Electrically conductive ribbon break detector for printers | Performing Operations; Transporting | 24 | Expired |
| US4396308A | Ribbon guiding for thermal lift-off correction | Performing Operations; Transporting | 20 | Expired |
| US9552143B2 | Systems and methods of interaction with water usage information | Electricity | 12 | Active |
| US4101905A | Method for writing and viewing magnetic human readable characters and viewing means therefor | Physics | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.