Hubert Hackenberg
15Patents
5h-index
23Co-inventors
62Inventor score
Filing activity: May 11, 1977 → Apr 22, 1992
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4482232A | Film Cartridge and/or camera with film arresting means | Physics | 28 | Expired |
| US4395107A | Film cassette | Physics | 14 | Expired |
| US4440483A | Photographic roll film camera | Physics | 11 | Expired |
| US4993698A | Film magazine | Performing Operations; Transporting | 10 | Expired |
| US4115792A | Film transport mechanism for cameras | Physics | 7 | Expired |
| US4593990A | Control device for controlling a diaphragm slot in a microfilm-reading and enlarging apparatus | Physics | 4 | Expired |
| US5200603A | Source distance adjustment arrangement for uniform illumination of projection surface | Physics | 4 | Expired |
| US4265527A | Flash unit and camera | Physics | 2 | Expired |
| US4293204A | Photographic camera having an automatic exposure control | Physics | 2 | Expired |
| US4754306A | Microfilm reading and reverse enlarging apparatus | Physics | 2 | Expired |
| US4350425A | Film transport arrangement for a camera | Physics | 1 | Expired |
| US4437751A | Film transport arrangement with perforation wheel for camera | Physics | 1 | Expired |
| US4165166A | Exposure controls for photographic apparatus | Physics | 1 | Expired |
| US5003343A | Projection copying apparatus and projection screen therefor | Physics | 1 | Expired |
| US4107703A | Film sensitivity detecting filter actuating camera | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.