Issued Patents All Time
Showing 1–25 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5859680 | Electrical addressing of ferroelectric liquid-crystal displays | Dietmar Jungbauer, Heinz Rieger, Gerhard Illian, Kazuya Nagao, Mikio Murakami +3 more | 1999-01-12 |
| 5702639 | Use of complex ligands for ions in ferroelectric liquid-crystal mixtures | Takamasa Harada, Gerhard Illian, Norbert Rosch, Rainer Wingen | 1997-12-30 |
| 5679792 | Derivatives of 3-cyclohexylpropionic acid, and the use thereof in ferroelectric liquid-crystal mixtures | Gerhard Illian, Hubert Schlosser, Rainer Wingen | 1997-10-21 |
| 5651918 | Optically active 1,3-dioxolane derivatives carrying a mesogenic radical in the 4-position, a process for their preparation and their use as doping agents in liquid-crystal mixtures | Gunter Scherowsky, Jurgen Gay, Rainer Wingen, Hans-Rolf Dubal, Wolfgang Hemmerling +3 more | 1997-07-29 |
| 5641428 | Use of optically active 1,3-dioxolane-4-carboxylates as dopes in liquid-crystal mixtures, liquid-crystal mixtures containing these compounds, and novel optically active 1,3-dioxolane-4-carboxylates | Rainer Wingen, Hans-Rolf Dubal, Wolfgang Hemmerling, Ingrid Muller, Dieter Ohlendorf | 1997-06-24 |
| 5630962 | 2-Fluoropyridines, their preparation and their use in liquid crystal mixtures | Hubert Schlosser, Rainer Wingen, Gerd Illian | 1997-05-20 |
| 5594575 | Ferroelectric liquid-crystal systems having three or more chiral additives with different signs of the helical twist in the cholesteric phase | Hans-Rolf Dubal, Takamasa Harada, Wolfgang Hemmerling, Gerhard Illian, Ingrid Muller +3 more | 1997-01-14 |
| 5539555 | High contrast distorted helex effect electro-optic devices and tight ferroelectric pitch ferroelectric liquid crystal compositions useful therein | Michael Wand, Mark A. Handschy, Rohini Vohra | 1996-07-23 |
| 5443754 | Pyridylpyrimidines, a process for their preparation and their use in liquid-crystalline mixtures | Gerhard Illian, Wolfgang Hemmerling, Rainer Wingen | 1995-08-22 |
| 5430564 | Process for producing ferroelectric liquid-crystal cells with oleophilic additive employing heat and low pressure overlapped a short time | Takamasa Harada, Gerhard Illian, Dieter Ohlendorf, Heinz Rieger, Norbert Rosch | 1995-07-04 |
| 5407599 | Cyclopropylaklyl or -alkenyl or heterocyclic compounds, process for their preparation and their use in liquid-crystalline mixtures | Armin de Meijere, Hans-Rolf Dubal, Wolfgang Hemmerling, Ingrid Muller, Dieter Ohlendorf +4 more | 1995-04-18 |
| 5384070 | Use of optically active tetrahydrofuran-2-carboxylic acid esters as dopants in liquid-crystal mixtures, liquid-crystal mixtures containing same and novel optically active tetrahydrofuran-2-carboxylic acid esters | Wolfgang Hemmerling, Hans-Rolf Dubal, Gerhard Illian, Yoshio Inoguchi, Ingrid Muller +3 more | 1995-01-24 |
| 5378394 | Ferroelectric liquid-crystalline mixtures | Hans-Rolf Dubal, Takamasa Harada, Wolfgang Hemmerling, Gerhard Illian, Ingrid Muller +3 more | 1995-01-03 |
| 5373380 | Ferroelectric liquid crystal display with liquid crystal mixtures having high spontaneous polarization and short helical pitch and alignment layers containing lipophilic or amphiphilic compounds | Takamasa Harada, Gerd Illian, Anke Kaltbeitzel, Norbert Rosch | 1994-12-13 |
| 5361152 | Process for producing ferroelectric liquid-crystal cells | Takamasa Harada, Gerhard Illian, Dieter Ohlendorf, Heinz Rieger, Norbert Rosch | 1994-11-01 |
| 5360576 | Chiral alkenylaryl 2,3-epoxyalkyl ethers, and the use thereof in liquid-crystalline mixtures | Karsten Blatter, Takamasa Harada, Peter Harnischfeger, Wolfgang Hemmerling | 1994-11-01 |
| 5354500 | Optically active carboxylic esters of oxygen-containing heterocycles as doping substances in liquid crystal mixtures and liquid crystal mixtures containing them | Wolfgang Hemmerling, Ingrid Muller, Hans-Rolf Dubal, Gerhard Illian, Mikio Murakami +2 more | 1994-10-11 |
| 5353136 | Ferroelectric liquid crystal with positive dielectric anisotropy, chevron structure and grey scale | Hans-Rolf Dubal, Takamasa Harada, Gerhard Illian, Mikio Murakami, Dieter Ohlendorf | 1994-10-04 |
| 5348684 | Organosilylalkyl or organosilylalkenyl compounds, process for preparing them and their use in liquid-crystalline mixtures | Wolfgang Hemmerling, Hans-Rolf Dubal, Gerhard Illian, Yoshio Inoguchi, Ingrid Muller +3 more | 1994-09-20 |
| 5333075 | Ferroelectric liquid crystal mixtures containing lipohilizing, lipophilic or amphiphilic compounds for eliminating ionic impurities | Takamasa Harada, Gerd Illian, Anke Kaltbeitzel, Norbert Rosch | 1994-07-26 |
| 5328638 | Optically active esters of 5-ethyl- and 5-vinyl-1,3-dioxolane-4-carboxylic acid, their use as doping substances in liquid crystal mixtures and the liquid crystal mixtures containing the new esters | Ingrid Muller, Hans-Rolf Dubal, Wolfgang Hemmerling, Gerhard Illian, Mikio Murakami +2 more | 1994-07-12 |
| 5286409 | Liquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixtures | Hans-Rolf Dubal, Takamasa Harada, Wolfgang Hemmerling, Gerhard Illian, Ingrid Muller +3 more | 1994-02-15 |
| 5257122 | Ferroelectric liquid crystal display having gray steps or a continuous gray scale | Hans-Rolf Dubal, Gerhard Illian, Mikio Murakami, Dieter Ohlendorf | 1993-10-26 |
| 5231528 | Ferroelectric liquid crystal components having high spontaneous polarization and low helical pitch | Wolfgang Hemmerling, Gerhard Illian, Takamasa Harada, Mikio Murakami | 1993-07-27 |
| 5206751 | Process for the production of an impact-resistant liquid crystal switching and display device | Gerhard Illian, Norbert Rosch, Takamasa Harada | 1993-04-27 |