Ehrhard Hellmig
3Patents
3h-index
1Co-inventors
30Inventor score
Filing activity: Mar 4, 1975 → Jul 7, 1975
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3977872A | Process for the production of negative continuous-tone images | Physics | 9 | Expired |
| US4036646A | Color correction of unwanted side densities in light-sensitive color photographic elements | Physics | 5 | Expired |
| US4023970A | Light-sensitive color photographic material with masking layer comprising spontaneously silver halide | Physics | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.