Inventor · disambiguated record
Raphael L. Levien
Also filed as: LEVIEN RAPHAEL · LEVIEN RAPHAEL L · LEVIEN RAPHAEL LINUS
32 granted patents·3 pending applications·808 citations·filing 1982–2016
97Inventor score
Top patents by PatentIndex Score
35 records- 0192US5544258AAutomatic tone correction of images using non-linear histogram processingFiled 1993·Granted Aug 6, 1996·133 cites·18 claims
- 0292US5218386AEyeglasses with spectral color shiftLEVIEN RAPHAEL L·Filed 1991·Granted Jun 8, 1993·138 cites·9 claims
- 0385US5388517AMethod and apparatus for automatic alignment of objects and register mark for use therewithFiled 1993·Granted Feb 14, 1995·44 cites·48 claims
- 0483US4523271ASoftware protection method and apparatusLEVIEN RAPHAEL L·Filed 1982·Granted Jun 11, 1985·62 cites·14 claims
- 0580US6097855AMethod and apparatus for image rotationFiled 1993·Granted Aug 1, 2000·51 cites·32 claims
- 0676US8810579B2Method and apparatus for interactive curve generationLEVIEN RAPHAEL L·Filed 2013·Granted Aug 19, 2014·3 cites·20 claims
- 0776US5917614AMethod and apparatus for error diffusion screening of images with improved smoothness in highlight and shadow regionsFiled 1992·Granted Jun 29, 1999·40 cites·40 claims
- 0876US5055942APhotographic image reproduction device using digital halftoning to screen images allowing adjustable coarsenessLEVIEN RAPHAEL L·Filed 1990·Granted Oct 8, 1991·36 cites·26 claims
- 0975US5524162AMethod and apparatus for adaptive sharpening of imagesFiled 1991·Granted Jun 4, 1996·50 cites·12 claims
- 1073US9230350B2Method and apparatus for interactive curve generationLEVIEN RAPHAEL L·Filed 2014·Granted Jan 5, 2016·2 cites·20 claims
- 1172US5442461AScreen generation for halftone screening of images with reduction of irrational correction artifactsFiled 1992·Granted Aug 15, 1995·33 cites·26 claims
- 1271US5337264ATime reversal gaussian approximation filterLEVIEN RAPHAEL L·Filed 1992·Granted Aug 9, 1994·31 cites·25 claims
- 1371US5276535AMethod and apparatus for halftoning of images using grayscale error diffusionLEVIEN RAPHAEL L·Filed 1991·Granted Jan 4, 1994·31 cites·24 claims
- 1470US5155588AColor correction and apparatus for photographic reproductionLEVIEN RAPHAEL L·Filed 1990·Granted Oct 13, 1992·32 cites·29 claims
- 1569US8843455B2System and method of font compression using selectable entropy encodingKUETTEL DAVID·Filed 2012·Granted Sep 23, 2014·2 cites·20 claims
- 1666US8510531B1Fast, dynamic cache packingHAASE CHET·Filed 2012·Granted Aug 13, 2013·2 cites·20 claims
- 1764US5402726ARegister markFiled 1993·Granted Apr 4, 1995·15 cites·8 claims
- 1864US5315406AScreen generation for halftone screening of images using arbitrary distribution of transformed screen coordinatesLEVIEN RAPHAEL L·Filed 1991·Granted May 24, 1994·23 cites·44 claims
- 1958US5331429ADigital generation of halftone images with error diffusion and frequency matched periodic screen rulingsLEVIEN RAPHAEL L·Filed 1992·Granted Jul 19, 1994·17 cites·34 claims
- 2058US5291310AScreen generation for halftone screening of imagesLEVIEN RAPHAEL L·Filed 1991·Granted Mar 1, 1994·17 cites·32 claims
- 2157US9098524B2System and method of font compression using selectable entropy encodingGOOGLE INC·Filed 2014·Granted Aug 4, 2015·0 cites·22 claims
- 2257US8520003B2Method and apparatus for interactive curve generationLEVIEN RAPHAEL L·Filed 2007·Granted Aug 27, 2013·1 cites·20 claims
- 2354US9563634B2System and method of compressing data in font filesGOOGLE INC·Filed 2015·Granted Feb 7, 2017·0 cites·18 claims
- 2453US10095674B2Maintaining state of document concurrently edited by two computing systems by determining locations of edits based on inverse transformationsGOOGLE INC·Filed 2016·Granted Oct 9, 2018·0 cites·21 claims
- 2553US9575896B2Fast, dynamic cache packingGOOGLE INC·Filed 2013·Granted Feb 21, 2017·0 cites·15 claims
- 2651US5307181AScreen generation for halftone screening of images using scan line segments of oversized screen scan linesLEVIEN RAPHAEL L·Filed 1991·Granted Apr 26, 1994·12 cites·26 claims
- 2750US9075816B2System and method of compressing data in font filesKUETTEL DAVID·Filed 2012·Granted Jul 7, 2015·0 cites·13 claims
- 2846US5991513AMethod and apparatus for suppressing moire patternsFiled 1997·Granted Nov 23, 1999·11 cites·53 claims
- 2945US5365602AIntegrated half-tone screening and enlarging using an enlargement mapping pattern having linked, unique pattern segmentsLEVIEN RAPHAEL L·Filed 1993·Granted Nov 15, 1994·9 cites·30 claims
- 3042US5404137AHigh speed transition signalling communication systemFiled 1991·Granted Apr 4, 1995·13 cites·24 claims
- 3141US9275018B2Techniques for analyzing web pages to determine font subsetsLEVIEN RAPHAEL LINUS·Filed 2012·Granted Mar 1, 2016·0 cites·30 claims
- 3239US2015193386A1System and Method of Facilitating Font Selection and Manipulation of FontsWURTZ DAVID ADAM·Filed 2012·Application pending·0 cites
- 3339US2015193385A1System and Method for Facilitating Font SelectionLENFANT-ENGELMANN JEREMIE·Filed 2012·Application pending·0 cites
- 3432US2005203919A1Method and apparatus for reordering an arbitrary order signal sequence into a streamable signal sequenceFiled 2004·Application pending·0 cites
- 3530USRE37907EPhotographic image reproduction device using digital halftoning to screen images allowing adjustable coarsenessFiled 1994·Granted Nov 19, 2002·0 cites·26 claims
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