Inventor · disambiguated record
Seongsik Chang
Also filed as: CHANG SEONGSIK
48 granted patents·9 pending applications·195 citations·filing 2004–2021
97Inventor score
Files withHEWLETT PACKARD DEVELOPMENT CO28CHANG SEONGSIK8HEWLETT PACKARD DEVELOPMENT CO LP6HP INDIGO BV5HO SENG-TIONG2
Top patents by PatentIndex Score
57 records- 0197US9778173B2Optical sensor systems having sensor and detection modulesHEWLETT PACKARD DEVELOPMENT CO LP·Filed 2017·Granted Oct 3, 2017·11 cites·20 claims
- 0295US11433212B1Self-contained face mask system with automatic droplet dispenser for humidificationHEALTH MICRO DEVICES CORP·Filed 2021·Granted Sep 6, 2022·8 cites·26 claims
- 0395US10262836B2Energy-efficient plasma processes of generating free charges, ozone, and lightCHANG SEONGSIK·Filed 2018·Granted Apr 16, 2019·8 cites·14 claims
- 0494US8492722B2Volatile organic compound sensorCHANG SEONGSIK·Filed 2011·Granted Jul 23, 2013·21 cites·15 claims
- 0593US8653439B2Image forming apparatus having optical sensor system, optical sensor system having heating module for removing deposit formation of volatile organic compounds there from, and method thereofNAUKA KRZYSZTOF·Filed 2011·Granted Feb 18, 2014·14 cites·20 claims
- 0693US7850274B1Printers and methods to reduce vapor emissions in printersHEWLETT PACKARD DEVELOPMENT CO·Filed 2010·Granted Dec 14, 2010·9 cites·15 claims
- 0792US9625374B2Image forming apparatus having optical sensor system, optical sensor system having shields, and method thereofCHANG SEONGSIK·Filed 2011·Granted Apr 18, 2017·11 cites·20 claims
- 0892US9423717B2Charge roller for electrographic printerHEWLETT PACKARD DEVELOPMENT CO LP·Filed 2012·Granted Aug 23, 2016·6 cites·15 claims
- 0991US9110007B2Image forming apparatus having optical sensor system, optical sensor system having detection modules, and method thereofBIRECKI HENRYK·Filed 2011·Granted Aug 18, 2015·11 cites·20 claims
- 1090US7623235B2Curved grating spectrometer with very high wavelength resolutionHO SENG-TIONG·Filed 2007·Granted Nov 24, 2009·22 cites·13 claims
- 1187US9977360B2Inner resistive film with ductile particles and outer resistive film without ductile particlesHEWLETT PACKARD DEVELOPMENT CO·Filed 2014·Granted May 22, 2018·2 cites·20 claims
- 1284US9513572B2Control for a non-contact charging rollerHEWLETT PACKARD DEVELOPMENT CO LP·Filed 2013·Granted Dec 6, 2016·3 cites·13 claims
- 1384US7756430B1Apparatus and method for charging an imaging memberHEWLETT PACKARD DEVELOPMENT CO·Filed 2006·Granted Jul 13, 2010·9 cites·21 claims
- 1483US7609999B2Apparatus for charging an image transfer surfaceHEWLETT PACKARD DEVELOPMENT CO·Filed 2005·Granted Oct 27, 2009·7 cites·27 claims
- 1582US7283233B1Curved grating spectrometer with very high wavelength resolutionHO SENG-TIONG·Filed 2004·Granted Oct 16, 2007·27 cites·8 claims
- 1677US7298993B2Imaging methods, image engines, and photoconductor charging systemsHEWLETT PACKARD DEVELOPMENT CO·Filed 2005·Granted Nov 20, 2007·5 cites·62 claims
- 1774US7174114B2Apparatus and method for reducing contamination of an image transfer deviceHEWLETT PACKARD DEVELOPMENT CO·Filed 2004·Granted Feb 6, 2007·13 cites·30 claims
- 1873US10514633B2Liquid electrophotographic ink developer unitHEWLETT PACKARD DEVELOPMENT CO·Filed 2016·Granted Dec 24, 2019·1 cites·14 claims
- 1971US10901344B2Binary ink developer (BID) assembly for liquid electrophotography (LEP) printing deviceHEWLETT PACKARD DEVELOPMENT CO·Filed 2019·Granted Jan 26, 2021·0 cites·20 claims
- 2068US9618869B2Printing using a metal-surface charging elementLEE MICHAEL H·Filed 2012·Granted Apr 11, 2017·1 cites·16 claims
- 2168US8488988B2Printers and apparatus to reduce emissions from a print substrate exit portLEE MICHAEL H·Filed 2010·Granted Jul 16, 2013·1 cites·20 claims
- 2267US10331055B2Inner resistive film with ductile particles and outer resistive filmHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Granted Jun 25, 2019·0 cites·20 claims
- 2366US10739719B2Photoconductor refreshing cyclesHP INDIGO BV·Filed 2019·Granted Aug 11, 2020·0 cites·20 claims
- 2465US11338367B2Metal powder compactorsHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Granted May 24, 2022·0 cites·16 claims
- 2565US10379456B2Charge roller positioningHP INDIGO BV·Filed 2018·Granted Aug 13, 2019·0 cites·20 claims
- 2664US9952527B2Liquid electrography printingHEWLETT PACKARD DEVELOPMENT CO·Filed 2017·Granted Apr 24, 2018·0 cites·15 claims
- 2762US10459372B2Binary ink developer (BID) assembly for liquid electrophotography (LEP) printing deviceHEWLETT PACKARD DEVELOPMENT CO·Filed 2017·Granted Oct 29, 2019·0 cites·9 claims
- 2862US9678454B2Liquid electrography printingHEWLETT PACKARD DEVELOPMENT CO LP·Filed 2013·Granted Jun 13, 2017·0 cites·15 claims
- 2961US10254676B2Charge roller for electrographic printerHEWLETT PACKARD DEVELOPMENT CO·Filed 2016·Granted Apr 9, 2019·0 cites·15 claims
- 3060US10784084B2Energy-efficient plasma processes of generating free charges, ozone, and lightCHANG SEONGSIK·Filed 2019·Granted Sep 22, 2020·0 cites·12 claims
- 3159US9846381B2Resistive film with ductile particlesHEWLETT PACKARD DEVELOPMENT CO LP·Filed 2014·Granted Dec 19, 2017·0 cites·15 claims
- 3257US12246377B2Powder bed materialsHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Granted Mar 11, 2025·0 cites·13 claims
- 3356US11845127B2Powder layer former with flowing gas sealHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Granted Dec 19, 2023·0 cites·15 claims
- 3456US11400544B2Selective laser melting (SLM) additive manufacturingHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Granted Aug 2, 2022·0 cites·20 claims
- 3556US10114308B2Charge roller positioningHP INDIGO BV·Filed 2015·Granted Oct 30, 2018·0 cites·15 claims
- 3656US7035567B2Apparatus and method for reducing contamination of an image transfer deviceHEWLETT PACKARD DEVELOPMENT CO·Filed 2004·Granted Apr 25, 2006·5 cites·20 claims
- 3754US11143978B2Charge roller gap determinationHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Granted Oct 12, 2021·0 cites·15 claims
- 3854US10338516B2Photoconductor refreshing cyclesHP INDIGO BV·Filed 2015·Granted Jul 2, 2019·0 cites·15 claims
- 3953US11320761B2Charge roller voltage determinationHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Granted May 3, 2022·0 cites·17 claims
- 4053US2023321730A1Non-uniform electric fields to compact metal powder build materialHEWLETT PACKARD DEVELOPMENT CO·Filed 2020·Application pending·0 cites
- 4153US2024190072A1Additive manufacture with line-shaped energy beamHEWLETT PACKARD DEVELOPMENT CO·Filed 2021·Application pending·0 cites
- 4252US9020401B2Apparatus, printers, and charge roller assembliesCHANG SEONGSIK·Filed 2011·Granted Apr 28, 2015·0 cites·18 claims
- 4351US9594326B2Photoconductive layer refreshHEWLETT PACKARD INDIGO BV·Filed 2013·Granted Mar 14, 2017·0 cites·14 claims
- 4451US2021205892A1Printing devicesHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Application pending·0 cites
- 4551US2021331252A1Selectively melt micron-sized particles using micro-mirrorsHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Application pending·0 cites
- 4650US11745266B2Additive manufacturing of metalsHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Granted Sep 5, 2023·0 cites·12 claims
- 4750US2021402474A1Additive manufacturing of metalsHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Application pending·0 cites
- 4849US10910211B2Electrical potential energy to electrical kinetic energy converter, ozone generator, and light emitterCHANG SEONGSIK·Filed 2019·Granted Feb 2, 2021·0 cites·17 claims
- 4949US9037045B2Charge rollers and apparatus including charge rollersGILA OMER·Filed 2011·Granted May 19, 2015·0 cites·20 claims
- 5049US8892005B2Printer charging blades and printersLAM QUANG P·Filed 2012·Granted Nov 18, 2014·0 cites·19 claims
Showing the top 50 of 57 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →