Helmut Treiber
29Patents
11h-index
34Co-inventors
75Inventor score
Filing activity: Nov 8, 1976 → Nov 13, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4589766A | Copying method and arrangement for colored originals | Physics | 28 | Expired |
| US4627719A | Method and apparatus for reproducing the images of film frames | Physics | 25 | Expired |
| US4152068A | Method and apparatus for evaluating developed photographic films prior to copying | Physics | 19 | Expired |
| US4469291A | Apparatus for introducing strip-shaped material into cassettes or the like | Physics | 15 | Expired |
| US4906854A | Processing method and apparatus for exposed and developed film with position sensing | Physics | 14 | Expired |
| US4947205A | Method of and apparatus for positioning photographic originals in a copying station | Physics | 13 | Expired |
| US4239384A | Method and apparatus for automatically recognizing photographic originals unsuitable for copying | Physics | 13 | Expired |
| US4873546A | Color printing method and apparatus | Physics | 13 | Expired |
| US6359676B1 | Method and apparatus for printing photographs from developed film onto light-sensitive photoprint material | Physics | 13 | Expired |
| US4492458A | Method of and arrangement for copying a colored original | Physics | 12 | Expired |
| US4099862A | Method and apparatus for evaluating developed photographic films preparatory to reproduction | Physics | 11 | Expired |
| US4561768A | Color copying method | Physics | 9 | Expired |
| US4566786A | Method of copying color exposures | Physics | 9 | Expired |
| US4649422A | Method of and arrangement for determining the sharpness of originals for reproduction | Physics | 9 | Expired |
| US4176964A | Determination of extreme density values of a transported strip of photographic originals | Physics | 8 | Expired |
| US5745252A | Method and apparatus for producing photographic index prints | Physics | 8 | Expired |
| US4565442A | Method of and apparatus for copying photographic originals | Physics | 7 | Expired |
| US4082465A | Determination of extreme density values of photographic originals | Physics | 6 | Expired |
| US5594525A | Method of printing photographs and apparatus for carrying out the method | Physics | 5 | Expired |
| US4987440A | Method of and apparatus for positioning image areas of film | Physics | 5 | Expired |
| US5192970A | Method and arrangement for copying filmstrips | Physics | 5 | Expired |
| US4919354A | Apparatus for replacing rolls of customer films in copying machines | Physics | 4 | Expired |
| US5668625A | Apparatus for and method for handling film in a photographic printer | Physics | 3 | Expired |
| US4585338A | Photographic copying apparatus | Physics | 3 | Expired |
| US4080066A | Apparatus for prereading film frames or the like | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.