Frederick Hetzel
9Patents
5h-index
17Co-inventors
60Inventor score
Filing activity: Jun 13, 1979 → Nov 16, 1998
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6084359A | Coil assembly for an electrodeless fluorescent lamp | Electricity | 111 | Expired |
| US4258287A | Circular fluorescent lamp unit | Electricity | 23 | Expired |
| US4928032A | Means for converting a lamp with a screw-type base into a lamp with a bi-pin base | Electricity | 11 | Expired |
| US6232707A | Wedge base lamp | Electricity | 7 | Expired |
| USD391650S | Fluorescent lamp | General | 7 | Expired |
| US5440199A | Base for electrodeless discharge lamp | Electricity | 4 | Expired |
| US4525230A | Method of manufacturing a ballast resistor support member | Electricity | 2 | Expired |
| US4447861A | Circular fluorescent lamp unit | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US4418328A | Method of manufacturing a ballast resistor support member and finished article | Electricity | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.