David W. Hagelbarger
4Patents
4h-index
7Co-inventors
43Inventor score
Filing activity: Jul 10, 1975 → May 12, 1989
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4291198A | General-purpose electronic telephone station set | Emerging Cross-Sectional Technologies | 121 | Expired |
| US5009477A | Optical interconnect arrangement | Electricity | 51 | Expired |
| USD263824S | General-purpose electronic telephone set base | General | 14 | Expired |
| US4007459A | Multitone pushbutton dial phase shift scanning circuitry | Electricity | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.