Friedrich Hujer
13Patents
9h-index
11Co-inventors
65Inventor score
Filing activity: Sep 7, 1973 → Mar 18, 1985
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3946507A | Label for use on containers for photographic film or the like | Physics | 26 | Expired |
| US4039258A | Method and apparatus for making reproductions of photograhic copy negatives or the like | Physics | 21 | Expired |
| US4239385A | Photographic copying machine with means for varying exposure across the surface of the original copied | Physics | 20 | Expired |
| US3948125A | Apparatus for treating webs of photographic material or the like | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4508224A | Container for photographic films and prints | Performing Operations; Transporting | 15 | Expired |
| US4094726A | Apparatus for processing exposed photographic films and cassettes for such films | Physics | 14 | Expired |
| US4128330A | Evaluation and copying of originals arranged in a strip | Physics | 12 | Expired |
| US4260245A | Apparatus for making test exposures on marginal portions of photographic films or the like | Physics | 11 | Expired |
| US3981579A | Apparatus for selecting originals for copying on the basis of image sharpness | Physics | 10 | Expired |
| US4154046A | Apparatus for processing developed photographic prints and films | Emerging Cross-Sectional Technologies | 8 | Expired |
| US3963344A | Photographic printing apparatus with reduced number of input means for entering correction values | Physics | 8 | Expired |
| US3976376A | Protecting strips of photographic film | Physics | 7 | Expired |
| US4592649A | Photographic roller copying apparatus | Physics | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.