Erwin Geyken
15Patents
8h-index
25Co-inventors
68Inventor score
Filing activity: Feb 28, 1974 → Nov 30, 1984
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3978506A | Apparatus and method for neutralizing waste photographic fluids | Physics | 20 | Expired |
| US4081816A | Apparatus for processing photographic film and treating contaminated processing liquids | Chemistry; Metallurgy | 20 | Expired |
| US4577949A | Developing device for a horizontally, transported photographic layer carrier | Physics | 18 | Expired |
| US4494706A | Apparatus for convoluting strips of photosensitive material or the like | Performing Operations; Transporting | 15 | Expired |
| US3971115A | Method of making roller | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4392177A | Transporting roller for webs of photosensitive material or the like | Performing Operations; Transporting | 11 | Expired |
| US4327988A | Apparatus for treating photographic materials | Physics | 11 | Expired |
| US4370046A | Method and apparatus for processing exposed photographic material with bath constituent supply outlet openings at different levels | Physics | 8 | Expired |
| US4160594A | Method and arrangement for the development of latent images particularly latent photographic images | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4586311A | Apparatus for removing strips of photosensitive material from flat envelopes | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4002267A | Method and apparatus for preparing photoprocessing solutions, and the like | Performing Operations; Transporting | 7 | Expired |
| US4449278A | Roller for supporting material sensitive to radiation and, method of making the same | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4128424A | Method for treating photographic processing fluids prior to sewering thereof | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4055879A | Roller | Performing Operations; Transporting | 3 | Expired |
| US4189803A | Wet-processing apparatus for photographic emulsion carriers with novel disposal of drier-unit exhaust air | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.