Assignee
HELL AG LINOTYPE
DE·67 granted patents·1,560 citations·filing 1990–1997
Top patents by PatentIndex Score
67 records- 0191US5748331AProcess control strip and method for recordingHELL AG LINOTYPE·Filed 1996·Granted May 5, 1998·20 cites·18 claims
- 0291US5668890AMethod 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 spaceHELL AG LINOTYPE·Filed 1996·Granted Sep 16, 1997·266 cites·13 claims
- 0387US5481380AMethod and apparatus for calibration of color valuesHELL AG LINOTYPE·Filed 1994·Granted Jan 2, 1996·116 cites·25 claims
- 0481US5835244AMethod and apparatus for the conversion of color valuesHELL AG LINOTYPE·Filed 1996·Granted Nov 10, 1998·88 cites·33 claims
- 0581US5748802AMethod and apparatus for the analysis and correction of the image gradation in image originalsHELL AG LINOTYPE·Filed 1995·Granted May 5, 1998·95 cites·26 claims
- 0680US5165079AOptical color-splitter arrangementHELL AG LINOTYPE·Filed 1990·Granted Nov 17, 1992·72 cites·8 claims
- 0778US5687300AProcess for creating five to seven color separations used on a multicolor pressHELL AG LINOTYPE·Filed 1995·Granted Nov 11, 1997·60 cites·11 claims
- 0875US5420704AMethod and apparatus for the analysis of color casts in color originalsHELL AG LINOTYPE·Filed 1994·Granted May 30, 1995·48 cites·20 claims
- 0973US5398121AMethod and device for generating a digital lookup table for printing inks in image reproduction equipmentHELL AG LINOTYPE·Filed 1991·Granted Mar 14, 1995·45 cites·12 claims
- 1069US5696839AMethod and apparatus for reproducing an image employing a transformation of color solidsHELL AG LINOTYPE·Filed 1995·Granted Dec 9, 1997·45 cites·13 claims
- 1168US6137903AColor transformation system based on target color imageHELL AG LINOTYPE·Filed 1997·Granted Oct 24, 2000·41 cites·13 claims
- 1268US5359436ABlack recalculation for arbitrary HSL corrections in CMY color spaceHELL AG LINOTYPE·Filed 1992·Granted Oct 25, 1994·29 cites·7 claims
- 1368US5329301ADevice for clamping sheet-shaped recording materialHELL AG LINOTYPE·Filed 1990·Granted Jul 12, 1994·32 cites·22 claims
- 1467US5489921AMethod for generating uniform color area definitions with addition and removal operatorsHELL AG LINOTYPE·Filed 1994·Granted Feb 6, 1996·34 cites·20 claims
- 1567US5319472AMultispectral color image pickup systemHELL AG LINOTYPE·Filed 1992·Granted Jun 7, 1994·30 cites·13 claims
- 1666US5751845AMethod for generating smooth color corrections in a color space, particularly a CIELAB color spaceHELL AG LINOTYPE·Filed 1996·Granted May 12, 1998·43 cites·28 claims
- 1766US5349451AMethod and apparatus for processing color valuesHELL AG LINOTYPE·Filed 1993·Granted Sep 20, 1994·40 cites·18 claims
- 1861US5946451AMethod for generating a contone mapHELL AG LINOTYPE·Filed 1996·Granted Aug 31, 1999·38 cites·19 claims
- 1961US5446502AMethod and apparatus for filtering signals having a filter in which signal amplitudes are allocated to a quantized, two-dimensional reference planeHELL AG LINOTYPE·Filed 1992·Granted Aug 29, 1995·21 cites·28 claims
- 2059US5845056AMethod for generating a screened gray proof having gray values from a color imageHELL AG LINOTYPE·Filed 1996·Granted Dec 1, 1998·28 cites·26 claims
- 2159US5581372AMethod for generating and storing digitized density thresholds for rastering a half tone original imageHELL AG LINOTYPE·Filed 1991·Granted Dec 3, 1996·20 cites·11 claims
- 2257US5612795AHSL corrections in CMY color spaceHELL AG LINOTYPE·Filed 1994·Granted Mar 18, 1997·18 cites·13 claims
- 2357US5469516AMethod for generating and storing digitized density thresholds for rastering a half tone original imageHELL AG LINOTYPE·Filed 1994·Granted Nov 21, 1995·18 cites·2 claims
- 2456US5459297AMethod and apparatus for manufacturing a texture drumHELL AG LINOTYPE·Filed 1991·Granted Oct 17, 1995·11 cites·11 claims
- 2555US5355156ADevice for automatically clamping and releasing recording material and operation of said deviceHELL AG LINOTYPE·Filed 1990·Granted Oct 11, 1994·19 cites·27 claims
- 2654US5303251AMethod and circuit arrangement for driving a laser diodeHELL AG LINOTYPE·Filed 1991·Granted Apr 12, 1994·15 cites·4 claims
- 2751US5883746AApparatus for beam splittingHELL AG LINOTYPE·Filed 1995·Granted Mar 16, 1999·17 cites·34 claims
- 2851US5504620ADevice for dividing an optical beamHELL AG LINOTYPE·Filed 1992·Granted Apr 2, 1996·15 cites·20 claims
- 2951US5313482AMethod and circuit arrangement for correcting the light power output of a laser diodeHELL AG LINOTYPE·Filed 1991·Granted May 17, 1994·15 cites·13 claims
- 3050US5572607AMethod and circuit arrangement for electronic retouching of imagesHELL AG LINOTYPE·Filed 1994·Granted Nov 5, 1996·17 cites·6 claims
- 3148US5748803AMethod and apparatus for image value correction in optoelectronic transducersHELL AG LINOTYPE·Filed 1996·Granted May 5, 1998·17 cites·6 claims
- 3248US5642436AMethod for generating and storing digitalized density threshold values for the rastering of a half-tone picture originalHELL AG LINOTYPE·Filed 1995·Granted Jun 24, 1997·15 cites·3 claims
- 3346US5559903AMethod for generating geometric masks with a digital color computerHELL AG LINOTYPE·Filed 1994·Granted Sep 24, 1996·12 cites·27 claims
- 3446US5278405AMethod and apparatus for the correction of positioning errors of a deflected light rayHELL AG LINOTYPE·Filed 1990·Granted Jan 11, 1994·13 cites·18 claims
- 3544US5459590AMethod and apparatus for freely selectable substitution of the achromatic part in multi color printing with the black inkHELL AG LINOTYPE·Filed 1994·Granted Oct 17, 1995·11 cites·4 claims
- 3642US5426529ALight beam deflection meansHELL AG LINOTYPE·Filed 1992·Granted Jun 20, 1995·10 cites·22 claims
- 3740US5420714ADevice for beam divisionHELL AG LINOTYPE·Filed 1992·Granted May 30, 1995·7 cites·6 claims
- 3840US5324912AMethod and apparatus for manufacturing a texture drumHELL AG LINOTYPE·Filed 1993·Granted Jun 28, 1994·5 cites·13 claims
- 3938US5828045AOptoelectronic record element with electronic feedback for power controlHELL AG LINOTYPE·Filed 1996·Granted Oct 27, 1998·4 cites·14 claims
- 4038US5502642AHSL neighborhoods in CMY color spaceHELL AG LINOTYPE·Filed 1995·Granted Mar 26, 1996·8 cites·10 claims
- 4138US5473734AMethod and apparatus for exposure calibration in recording devicesHELL AG LINOTYPE·Filed 1993·Granted Dec 5, 1995·11 cites·18 claims
- 4238US5357375ASymmetrical prism beam deflectorHELL AG LINOTYPE·Filed 1993·Granted Oct 18, 1994·5 cites·23 claims
- 4336US5438179AMethod and apparatus for manufacturing texture drumsHELL AG LINOTYPE·Filed 1991·Granted Aug 1, 1995·4 cites·16 claims
- 4435US5432716AMethod and apparatus for filtering signalsHELL AG LINOTYPE·Filed 1992·Granted Jul 11, 1995·8 cites·17 claims
- 4535US5369425ADevice for automatically clamping and releasing recording material and operation of said deviceHELL AG LINOTYPE·Filed 1990·Granted Nov 29, 1994·6 cites·15 claims
- 4634US5816585AChuck element for machine tools with rotating jaw chuckHELL AG LINOTYPE·Filed 1996·Granted Oct 6, 1998·8 cites·10 claims
- 4734US5430288AMethod and apparatus for setting the sharpness of an optical imaging systemHELL AG LINOTYPE·Filed 1993·Granted Jul 4, 1995·8 cites·24 claims
- 4833US5583687ALight beam deflection deviceHELL AG LINOTYPE·Filed 1995·Granted Dec 10, 1996·3 cites·18 claims
- 4932US5661586AOptical positioning system for at least one picture elementHELL AG LINOTYPE·Filed 1995·Granted Aug 26, 1997·2 cites·2 claims
- 5032US5508730APhotosetting apparatus, particularly a laser exposer, having a cylindrical bedHELL AG LINOTYPE·Filed 1992·Granted Apr 16, 1996·6 cites·15 claims
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