Hans Gref
9Patents
4h-index
15Co-inventors
54Inventor score
Filing activity: Nov 17, 1972 → Jul 3, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD466685S1 | Metal casing and umbrella | General | 10 | Expired |
| US4241023A | Apparatus for the continuous preparation of photographic emulsions | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4334884A | Process for the continuous preparation of photographic emulsions | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4221184A | Casting block of stable shape | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4095063A | Detection device for paper or film in web form | Physics | 4 | Expired |
| US4014491A | Arrangement for adjusting and measuring web tension levels | Performing Operations; Transporting | 3 | Expired |
| US4344552A | Independent drive for a roller cavity suction apparatus | Performing Operations; Transporting | 2 | Expired |
| US4276853A | Experimental plant for the coating and drying of material in the form of webs | Physics | 0 | Expired |
| US3983839A | Multiple coating apparatus | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.