Inventor · disambiguated record
Gerd Heppke
Also filed as: HEPPKE GERD
18 granted patents·388 citations·filing 1979–2001
95Inventor score
Top patents by PatentIndex Score
18 records- 0190US4818076AColor-selective circular polarizer and its useMERCK PATENT GMBH·Filed 1987·Granted Apr 4, 1989·81 cites·17 claims
- 0287US4744918ALiquid crystal phaseMERCK PATENT GMBH·Filed 1985·Granted May 17, 1988·52 cites·5 claims
- 0385US4927244AUse of compounds or mixtures of compounds which have a chiral, orthogonal, more highly ordered smectic phase in the range of said phase as switching or indicating mediumHOECHST AG·Filed 1988·Granted May 22, 1990·22 cites·3 claims
- 0482US4264148ALiquid crystal display devices having an induced cholesteric phaseSIEMENS AG·Filed 1979·Granted Apr 28, 1981·41 cites·14 claims
- 0579US4826620AChiral phenolic esters of mesogenic carboxylic acids and their use as admixture in liquid crystal phasesHOECHST AG·Filed 1988·Granted May 2, 1989·33 cites·5 claims
- 0676US4650600ALiquid crystal phaseMERCK PATENT GMBH·Filed 1984·Granted Mar 17, 1987·31 cites·17 claims
- 0774US4988458ALiquid crystal phase containing admixtures which effect temperature compensationHOECHST AG·Filed 1989·Granted Jan 29, 1991·26 cites·5 claims
- 0870US4767194ABlue phase liquid crystal system, method of operation and its useMERCK PATENT GMBH·Filed 1987·Granted Aug 30, 1988·37 cites·20 claims
- 0965US4997591AChiral smetic liquid crystals and glassy materials containing the same for displaying and storing informationHOECHST AG·Filed 1989·Granted Mar 5, 1991·17 cites·4 claims
- 1057US6924009B2Electro-optical devices from banana-shaped liquid crystalsUNIV KENT STATE OHIO·Filed 2001·Granted Aug 2, 2005·7 cites·22 claims
- 1156US4855429AChiral esters formed from α-substituted carboxylic acids and mesogenic hydroxyl compounds, and their use as dopants in liquid-crystalline phasesHOECHST AG·Filed 1987·Granted Aug 8, 1989·4 cites·7 claims
- 1252US5043095AChiral esters of mesogenic carboxylic acids in liquid crystal phasesHOECHST AG·Filed 1990·Granted Aug 27, 1991·10 cites·4 claims
- 1352US4874545AChiral esters of α-substituted phenylalkanoic acids and mesogenic hydroxy compounds, and their use as a doping substance in liquid crystal phasesHOECHST AG·Filed 1987·Granted Oct 17, 1989·11 cites·3 claims
- 1445US5236618ALiquid crystal phaseMERCK PATENT GMBH·Filed 1988·Granted Aug 17, 1993·8 cites·16 claims
- 1536US5776363ACompounds having side chains with multiple methyl branches and their use in liquid-crystal mixturesHOECHST AG·Filed 1996·Granted Jul 7, 1998·4 cites·9 claims
- 1629US4939287AChiral esters of mesogenic carboxylic acidsHOECHST AG·Filed 1986·Granted Jul 3, 1990·1 cites·1 claims
- 1728US4491532ALiquid-crystal mixture with a pleochroic anthraquinone dye, and method for producing such a dyeSIEMENS AG·Filed 1981·Granted Jan 1, 1985·1 cites·17 claims
- 1827US5384068ASwitchable columnar liquid-crystalline systemsHOECHST AG·Filed 1992·Granted Jan 24, 1995·2 cites·24 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →