Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5859680 | Electrical addressing of ferroelectric liquid-crystal displays | Dietmar Jungbauer, Heinz Rieger, Claus Escher, Gerhard Illian, Kazuya Nagao +3 more | 1999-01-12 |
| 5594575 | Ferroelectric liquid-crystal systems having three or more chiral additives with different signs of the helical twist in the cholesteric phase | Claus Escher, Hans-Rolf Dubal, Takamasa Harada, Wolfgang Hemmerling, Gerhard Illian +3 more | 1997-01-14 |
| 5437813 | Liquid crystal display device | Mitsuru Akashi, Haruhiko Itoh | 1995-08-01 |
| 5408347 | Polyester based liquid-crystal display device | Takamasa Harada | 1995-04-18 |
| 5407599 | Cyclopropylaklyl or -alkenyl or heterocyclic compounds, process for their preparation and their use in liquid-crystalline mixtures | Armin de Meijere, Hans-Rolf Dubal, Claus Escher, Wolfgang Hemmerling, Ingrid Muller +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, Claus Escher, Gerhard Illian, Yoshio Inoguchi +3 more | 1995-01-24 |
| 5378394 | Ferroelectric liquid-crystalline mixtures | Hans-Rolf Dubal, Claus Escher, Takamasa Harada, Wolfgang Hemmerling, Gerhard Illian +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, Hans-Rolf Dubal, Claus Escher, Gerhard Illian +2 more | 1994-10-11 |
| 5353136 | Ferroelectric liquid crystal with positive dielectric anisotropy, chevron structure and grey scale | Claus Escher, Hans-Rolf Dubal, Takamasa Harada, Gerhard Illian, 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, Claus Escher, Gerhard Illian, Yoshio Inoguchi +3 more | 1994-09-20 |
| 5331081 | Use of fluorinated aromatic polyamides as orientation layer for liquid-crystal switching and display devices | Hans-Rolf Dubal, 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, Hans-Rolf Dubal, Claus Escher, Wolfgang Hemmerling, Gerhard Illian +2 more | 1994-07-12 |
| 5286409 | Liquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixtures | Hans-Rolf Dubal, Claus Escher, Takamasa Harada, Wolfgang Hemmerling, Gerhard Illian +3 more | 1994-02-15 |
| 5257122 | Ferroelectric liquid crystal display having gray steps or a continuous gray scale | Hans-Rolf Dubal, Claus Escher, Gerhard Illian, Dieter Ohlendorf | 1993-10-26 |
| 5231528 | Ferroelectric liquid crystal components having high spontaneous polarization and low helical pitch | Claus Escher, Wolfgang Hemmerling, Gerhard Illian, Takamasa Harada | 1993-07-27 |
| 5196501 | Substituted aromatic polyamides as orientation layers for liquid crystal display elements and liquid crystal switching elements | Hans-Rolf Dubal, Otto Herrmann-Schonherr, Arnold Schneller | 1993-03-23 |
| 5166304 | Use of polyaryl ether ketones as alignment layers | Hans-Rolf Dubal, Hans-Otto Drotloff, Michael-Joachim Brekner | 1992-11-24 |
| 5118538 | Electrically conductive polymers and their use as orienting layer in liquid-crystal switching and display elements | Claus Escher, Hans-Rolf Dubal, Michael Feldhues, Takamasa Harada, Gerhard Illian +3 more | 1992-06-02 |