Issued Patents All Time
Showing 1–25 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9388338 | Liquid crystal mixture | Ji Li, Toshiaki Nonaka, Ayako Ogawa, Barbara Hornung, Wolfgang Schmidt +1 more | 2016-07-12 |
| 7019811 | Smectic liquid crystal high-contrast control or display device | Barbara Hornung, Toshiaki Nonaka | 2006-03-28 |
| 6958176 | Liquid crystal mixture | Ji Li, Toshiaki Nonaka, Ayako Ogawa, Barbara Hornung, Wolfgang Schmidt +1 more | 2005-10-25 |
| 6824707 | Active matrix liquid crystal device and smectic liquid crystal mixture | Haruki Amakawa, Toshiaki Nonaka, Rainer Wingen | 2004-11-30 |
| 6793984 | Fluorinated (dihydro)phenanthrene derivatives, and their use in liquid-crystalline media | Matthias Bremer, Detlef Pauluth, Michael Heckmeier, Barbara Hornung, Wolfgang Schmidt +1 more | 2004-09-21 |
| 6746731 | Ferroelectric active matrix displays with wide operating temperature range | Toshiaki Nonaka, Rainer Wingen | 2004-06-08 |
| 6704086 | Monostable ferroelectric active-matrix display | Rainer Wingen, Toshiaki Nonaka | 2004-03-09 |
| 6661494 | Monostable ferroelectric active matrix display | Rainer Wingen, Toshiaki Nonaka | 2003-12-09 |
| 6549188 | Ferroelectric liquid-crystal display with wide range of working temperatures | Ayako Takeichi, Barbara Hornung | 2003-04-15 |
| 6495220 | Disubstituted phenanthrenes and their use in liquid-crystal mixtures | Barbara Hornung, Wolfgang Schmidt, Rainer Wingen | 2002-12-17 |
| 6482479 | Active matrix displays having high contrast values | Toshiaki Nonaka, Rainer Wingen | 2002-11-19 |
| 6368679 | Ferroelectric liquid-crystal display having active matric elements | Wolfgang Schmidt | 2002-04-09 |
| 6365238 | Chip card with bistable display | — | 2002-04-02 |
| 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, Claus Escher, 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, Claus Escher, Wolfgang Hemmerling, Ingrid Muller, Dieter Ohlendorf | 1997-06-24 |
| 5594575 | Ferroelectric liquid-crystal systems having three or more chiral additives with different signs of the helical twist in the cholesteric phase | Claus Escher, Takamasa Harada, Wolfgang Hemmerling, Gerhard Illian, Ingrid Muller +3 more | 1997-01-14 |
| 5407599 | Cyclopropylaklyl or -alkenyl or heterocyclic compounds, process for their preparation and their use in liquid-crystalline mixtures | Armin de Meijere, Claus Escher, 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, Claus Escher, Gerhard Illian, Yoshio Inoguchi, Ingrid Muller +3 more | 1995-01-24 |
| 5384168 | Ferroelectric liquid-crystal display of high contrast and brightness | Takamasa Harada, Heinz Rieger, Norbert Rosch, Peter Wegener | 1995-01-24 |
| 5378394 | Ferroelectric liquid-crystalline mixtures | Claus Escher, Takamasa Harada, Wolfgang Hemmerling, Gerhard Illian, Ingrid Muller +3 more | 1995-01-03 |
| 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, Claus Escher, Gerhard Illian, Mikio Murakami +2 more | 1994-10-11 |
| 5353136 | Ferroelectric liquid crystal with positive dielectric anisotropy, chevron structure and grey scale | Claus Escher, 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, Claus Escher, Gerhard Illian, Yoshio Inoguchi, Ingrid Muller +3 more | 1994-09-20 |
| 5331081 | Use of fluorinated aromatic polyamides as orientation layer for liquid-crystal switching and display devices | Mikio Murakami, Otto Herrmann-Schonherr, Arnold Schneller | 1994-07-19 |
| 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, Claus Escher, Wolfgang Hemmerling, Gerhard Illian, Mikio Murakami +2 more | 1994-07-12 |