Linotype-Hell AG
69Patents
0Active
69Granted
37Portfolio score
Filing activity: Jul 29, 1991 → Jun 3, 1997
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5668890A | Method and apparatus for the automatic analysis of density range, color cast, and gradation of image originals on the BaSis of image values transformed from a first color space into a second color space | Electricity | 174 | Expired |
| US5481380A | Method and apparatus for calibration of color values | Electricity | 77 | Expired |
| US5835244A | Method and apparatus for the conversion of color values | Electricity | 56 | Expired |
| US5165079A | Optical color-splitter arrangement | Physics | 54 | Expired |
| US5748802A | Method and apparatus for the analysis and correction of the image gradation in image originals | Electricity | 44 | Expired |
| US5349451A | Method and apparatus for processing color values | Electricity | 35 | Expired |
| US5687300A | Process for creating five to seven color separations used on a multicolor press | Electricity | 35 | Expired |
| US5751845A | Method for generating smooth color corrections in a color space, particularly a CIELAB color space | Electricity | 30 | Expired |
| US5398121A | Method and device for generating a digital lookup table for printing inks in image reproduction equipment | Electricity | 28 | Expired |
| US5420704A | Method and apparatus for the analysis of color casts in color originals | Electricity | 26 | Expired |
| US5696839A | Method and apparatus for reproducing an image employing a transformation of color solids | Electricity | 26 | Expired |
| US5329301A | Device for clamping sheet-shaped recording material | Electricity | 20 | Expired |
| US5946451A | Method for generating a contone map | Physics | 20 | Expired |
| US5489921A | Method for generating uniform color area definitions with addition and removal operators | Electricity | 20 | Expired |
| US5359436A | Black recalculation for arbitrary HSL corrections in CMY color space | Electricity | 20 | Expired |
| US5319472A | Multispectral color image pickup system | Electricity | 19 | Expired |
| US6137903A | Color transformation system based on target color image | Electricity | 17 | Expired |
| US5845056A | Method for generating a screened gray proof having gray values from a color image | Electricity | 16 | Expired |
| US5581372A | Method for generating and storing digitized density thresholds for rastering a half tone original image | Electricity | 15 | Expired |
| US5469516A | Method for generating and storing digitized density thresholds for rastering a half tone original image | Electricity | 13 | Expired |
| US5446502A | Method and apparatus for filtering signals having a filter in which signal amplitudes are allocated to a quantized, two-dimensional reference plane | Electricity | 12 | Expired |
| US5612795A | HSL corrections in CMY color space | Electricity | 12 | Expired |
| US5313482A | Method and circuit arrangement for correcting the light power output of a laser diode | Electricity | 12 | Expired |
| US5572607A | Method and circuit arrangement for electronic retouching of images | Electricity | 10 | Expired |
| US5883746A | Apparatus for beam splitting | Physics | 10 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.