Inventor · disambiguated record
Duane Marhefka
Also filed as: MARHEFKA DUANE · MARHEFKA DUANE W
10 granted patents·4 pending applications·53 citations·filing 2005–2021
85Inventor score
Top patents by PatentIndex Score
14 records- 0192US7479940B2Display device with electrical zipper interconnectKENT DISPLAYS INC·Filed 2005·Granted Jan 20, 2009·31 cites·46 claims
- 0291US10558065B2Liquid crystal writing device with slow discharge eraseKENT DISPLAYS INC·Filed 2018·Granted Feb 11, 2020·6 cites·24 claims
- 0382US9134561B2Writing tablet information recording deviceKENT DISPLAYS INC·Filed 2013·Granted Sep 15, 2015·4 cites·19 claims
- 0480US11609470B1Writing device including cholesteric liquid crystal and having sectional eraseKENT DISPLAYS INC·Filed 2021·Granted Mar 21, 2023·1 cites·21 claims
- 0580US8310630B2Electronic skin having uniform gray scale reflectivityMARHEFKA DUANE W·Filed 2008·Granted Nov 13, 2012·8 cites·24 claims
- 0676US7675239B2Power management method and device for low-power displaysKENT DISPLAYS INC·Filed 2006·Granted Mar 9, 2010·3 cites·32 claims
- 0755US10634939B2Selectively erasable eWriter with user adjustmentKENT DISPLAYS INC·Filed 2018·Granted Apr 28, 2020·0 cites·21 claims
- 0853US8436847B2Video rate ChLCD driving with active matrix backplanesMARHEFKA DUANE·Filed 2009·Granted May 7, 2013·0 cites·34 claims
- 0952US10649261B2Liquid crystal eWriter system with resistive digitizer and having mechanical palm rejectionKENT DISPLAYS INC·Filed 2017·Granted May 12, 2020·0 cites·44 claims
- 1049US2007279350A1Method and apparatus for driving bistable liquid crystal displayKENT DISPLAYS INC·Filed 2007·Application pending·0 cites
- 1146US8502763B2Electronic skin having uniform gray scale reflectivityMARHEFKA DUANE W·Filed 2011·Granted Aug 6, 2013·0 cites·17 claims
- 1244US2013342432A1Cholesteric Liquid Crystal Writing Tablet Erased By A Piezoelectric TransducerKENT DISPLAYS INC·Filed 2013·Application pending·0 cites
- 1343US2013107144A1Writing tablet information recording deviceKENT DISPLAYS INC·Filed 2012·Application pending·0 cites
- 1434US2012268420A1Writing tablet information recording deviceMARHEFKA DUANE·Filed 2012·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →