Inventor
Seongsik Chang
Inventor
Santa Clara, CA, US
Overview
Patents· 38 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G03Gprimary
G03GElectrography55%
G01NInvestigating or analysing materials by determining their chemical or physical properties7%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light5%
B41FPrinting machines or presses4%
C01BNon-metallic elements4%
C02FTreatment of water, waste water, sewage, or sludge4%
H01JElectric discharge tubes or discharge lamps4%
H05HPlasma technique4%
Y10TTechnical subjects covered by former us classification4%
B41JTypewriters2%
PatentTitleYear
11,036,174Wheel202110,784,084Energy-efficient plasma processes of generating free charges, ozone, and light202010,739,719Photoconductor refreshing cycles202010,514,633Liquid electrophotographic ink developer unit201910,459,372Binary ink developer (BID) assembly for liquid electrophotography (LEP) printing device201910,379,456Charge roller positioning201910,353,316Printing with metal-surface charge element in glow discharge regime201910,338,516Photoconductor refreshing cycles201910,331,055Inner resistive film with ductile particles and outer resistive film201910,262,836Energy-efficient plasma processes of generating free charges, ozone, and light201910,254,676Charge roller for electrographic printer201910,114,308Charge roller positioning20189,977,360Inner resistive film with ductile particles and outer resistive film without ductile particles20189,952,527Liquid electrography printing20189,846,381Resistive film with ductile particles20179,778,173'Optical sensor systems having sensor and detection modules'20179,678,454'Liquid electrography printing'20179,625,374'Image forming apparatus having optical sensor system, optical sensor system having shields, and method thereof'20179,618,869'Printing using a metal-surface charging element'20179,594,326'Photoconductive layer refresh'20179,513,572'Control for a non-contact charging roller'20169,423,717'Charge roller for electrographic printer'20169,110,007'Image forming apparatus having optical sensor system, optical sensor system having detection modules, and method thereof'20159,037,045'Charge rollers and apparatus including charge rollers'20159,020,401'Apparatus, printers, and charge roller assemblies'20158,892,005'Printer charging blades and printers'20148,653,439'Image forming apparatus having optical sensor system, optical sensor system having heating module for removing deposit formation of volatile organic compounds there from, and method thereof'20148,492,722'Volatile organic compound sensor'20138,488,988'Printers and apparatus to reduce emissions from a print substrate exit port'20138,326,173'Hard imaging devices, humidity control systems and hard imaging methods'20127,850,274'Printers and methods to reduce vapor emissions in printers'20107,756,430'Apparatus and method for charging an imaging member'20107,623,235'Curved grating spectrometer with very high wavelength resolution'20097,609,999'Apparatus for charging an image transfer surface'20097,298,993'Imaging methods, image engines, and photoconductor charging systems'20077,283,233'Curved grating spectrometer with very high wavelength resolution'20077,174,114'Apparatus and method for reducing contamination of an image transfer device'20077,035,567'Apparatus and method for reducing contamination of an image transfer device'2006Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2006–2019Patents assigned to HEWLETT PACKARD DEVELOPMENT CO (21)· patent assignee history
2006–2007Based in San Jose, CA, US· patent location history
2007–2020Patents assigned to CHANG SEONGSIK (16)· patent assignee history
2007Based in Dublin, CA, US· patent location history
2009–2020Based in Santa Clara, CA, US· patent location history
2010–2021Based in Palo Alto, CA, US· patent location history
2012–2019Patents assigned to GILA OMER (7)· patent assignee history
2012–2019Patents assigned to LEE MICHAEL H (7)· patent assignee history
2016–2017Patents assigned to HEWLETT PACKARD DEVELOPMENT CO LP (7)· patent assignee history
2019Based in Houston, TX, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HEWLETT PACKARD DEVELOPMENT CO | 21 | 2006–2019 |
| CHANG SEONGSIKself | 16 | 2007–2020 |
| GILA OMER | 7 | 2012–2019 |
| HEWLETT PACKARD DEVELOPMENT CO LP | 7 | 2016–2017 |
| LEE MICHAEL H | 7 | 2012–2019 |
Locations
| Location | Patents | Span |
|---|---|---|
| Santa Clara, California, US | 22 | 2009–2020 |
| Palo Alto, California, US | 11 | 2010–2021 |
| San Jose, California, US | 3 | 2006–2007 |
| Houston, Texas, US | 1 | 2019 |
| Dublin, California, US | 1 | 2007 |