Inventor · disambiguated record
In-Duk Hwang
Also filed as: HWANG IN D · HWANG IN-DUK
56 granted patents·10 pending applications·437 citations·filing 1996–2025
98Inventor score
Files withHEXACHECK INC26SAMSUNG ELECTRONICS CO LTD21WELLBEINGSOFT INC6HWANG IN-DUK4HEXACHECK CO LTD2
Top patents by PatentIndex Score
66 records- 0195US11642066B2Electrocardiogram measurement apparatusHWANG IN DUK·Filed 2022·Granted May 9, 2023·2 cites·17 claims
- 0294US7672702B2Noninvasive in vivo measuring system and noninvasive in vivo measuring method by correcting influence of HemoglobinSAMSUNG ELECTRONICS CO LTD·Filed 2007·Granted Mar 2, 2010·25 cites·18 claims
- 0392US11589793B2Electrocardiogram measurement apparatusHEXACHECK INC·Filed 2018·Granted Feb 28, 2023·9 cites·17 claims
- 0491US7310542B2Non-invasive body component concentration measuring apparatus and method of noninvasively measuring a concentration of a body component using the sameSAMSUNG ELECTRONICS CO LTD·Filed 2005·Granted Dec 18, 2007·109 cites·19 claims
- 0590US2025331759A1Low-power electrocardiogram (ecg) measurement methodHEXACHECK INC·Filed 2025·Application pending·0 cites
- 0685US7148701B2Apparatus for measuring electrical impedanceRES & IND COOPERATION GROUP·Filed 2004·Granted Dec 12, 2006·32 cites·8 claims
- 0784US12414723B2Electrocardiogram measurement apparatusHEXACHECK INC·Filed 2023·Granted Sep 16, 2025·0 cites·28 claims
- 0884US12414724B2Electrocardiogram measurement apparatusHEXACHECK INC·Filed 2023·Granted Sep 16, 2025·0 cites·19 claims
- 0984US11931156B2Electrocardiogram measurement apparatusHEXACHECK INC·Filed 2023·Granted Mar 19, 2024·0 cites·16 claims
- 1084US6921366B2Apparatus and method for non-invasively measuring bio-fluid concentrations using photoacoustic spectroscopySAMSUNG ELECTRONICS CO LTD·Filed 2003·Granted Jul 26, 2005·25 cites·37 claims
- 1182USD895118SElectrocardiographic deviceWELLBEINGSOFT INC·Filed 2019·Granted Sep 1, 2020·19 cites·1 claims
- 1280US8986611B2Sample analysis apparatusLEE YONG KOO·Filed 2012·Granted Mar 24, 2015·4 cites·18 claims
- 1379US12357219B2Electrocardiogram measurement apparatusHEXACHECK INC·Filed 2025·Granted Jul 15, 2025·0 cites·24 claims
- 1479US12350056B2Electrocardiogram measurement apparatusHEXACHECK INC·Filed 2025·Granted Jul 8, 2025·0 cites·24 claims
- 1575USD933838SElectrocardiographic deviceHEXACHECK INC·Filed 2020·Granted Oct 19, 2021·6 cites·1 claims
- 1675USD933235SRing-shaped electrocardiographic deviceHEXACHECK INC·Filed 2020·Granted Oct 12, 2021·6 cites·1 claims
- 1775US8306593B2Noninvasive apparatus and method for measuring blood sugar concentrationHWANG IN DUK·Filed 2007·Granted Nov 6, 2012·14 cites·20 claims
- 1874USD895120SElectrocardiographic deviceWELLBEINGSOFT INC·Filed 2019·Granted Sep 1, 2020·13 cites·1 claims
- 1973USD913499SElectrocardiographic deviceHEXACHECK INC·Filed 2019·Granted Mar 16, 2021·12 cites·1 claims
- 2072USD895119SElectrocardiographic deviceWELLBEINGSOFT INC·Filed 2019·Granted Sep 1, 2020·12 cites·1 claims
- 2170USD915600SSmartwatch with electrocardiograph electrodesWELLBEINGSOFT INC·Filed 2019·Granted Apr 6, 2021·11 cites·1 claims
- 2270US8200305B2Variable wavelength generating method and apparatus thereof, for use in measuring body fluids constituent concentrationHWANG IN-DUK·Filed 2005·Granted Jun 12, 2012·8 cites·25 claims
- 2369USD933243SElectrocardiographic deviceHEXACHECK INC·Filed 2020·Granted Oct 12, 2021·4 cites·1 claims
- 2468USD919095SElectrocardiograph for a wireless communication deviceWELLBEINGSOFT INC·Filed 2019·Granted May 11, 2021·10 cites·1 claims
- 2566US7953474B2Apparatus, method and optical sensor module using a tilter for body fat measurementSAMSUNG ELECTRONICS CO LTD·Filed 2007·Granted May 31, 2011·4 cites·18 claims
- 2666US7248911B2Method and apparatus for noninvasively measuring a concentration of a blood componentSAMSUNG ELECTRONICS CO LTD·Filed 2004·Granted Jul 24, 2007·6 cites·21 claims
- 2763US7107087B2Method and apparatus for measuring a concentration of a component in a subjectSAMSUNG ELECTRONICS CO LTD·Filed 2004·Granted Sep 12, 2006·30 cites·19 claims
- 2862US2024099633A1Electrocardiogram measurement apparatusHEXACHECK CO LTD·Filed 2023·Application pending·0 cites
- 2961US8046056B2Body fat measurement apparatus and method of operating the apparatusSAMSUNG ELECTRONICS CO LTD·Filed 2007·Granted Oct 25, 2011·2 cites·8 claims
- 3061US2024065606A1Electrocardiogram measurement apparatusHEXACHECK CO LTD·Filed 2023·Application pending·0 cites
- 3160US7805184B2Portable body fat measurement device and optical sensor module of the deviceSAMSUNG ELECTRONICS CO LTD·Filed 2007·Granted Sep 28, 2010·1 cites·19 claims
- 3260US6944571B2Method and apparatus of estimating pure spectra and a concentration of a mixtureSAMSUNG ELECTRONICS CO LTD·Filed 2003·Granted Sep 13, 2005·7 cites·13 claims
- 3360US5767756AActive quadrature power splitterKOREA ELECTRONICS TELECOMM·Filed 1996·Granted Jun 16, 1998·16 cites·42 claims
- 3459US8116851B2Living body measurement apparatus with waveguide light source and light extracting patternCHO JAE-GEOL·Filed 2007·Granted Feb 14, 2012·1 cites·16 claims
- 3557USD918392SSmartwatch with electrocardiograph electrodesHEXACHECK INC·Filed 2019·Granted May 4, 2021·6 cites·1 claims
- 3657USD912823SElectrocardiographic deviceHEXACHECK INC·Filed 2019·Granted Mar 9, 2021·6 cites·1 claims
- 3757US2024237934A1Wearable device for acquiring plural electrocardiogram lead signalsHEXACHECK INC·Filed 2022·Application pending·0 cites
- 3855USD930164SSmartwatch with electrocardiograph electrodesHEXACHECK INC·Filed 2020·Granted Sep 7, 2021·2 cites·1 claims
- 3955USD930165SSmartband with electrocardiograph electrodesHEXACHECK INC·Filed 2020·Granted Sep 7, 2021·2 cites·1 claims
- 4054USD913500SElectrocardiographic deviceHEXACHECK INC·Filed 2019·Granted Mar 16, 2021·5 cites·1 claims
- 4152US2010081207A1Assay material, method of detecting a target using the same, and method of producing the sameSAMSUNG ELECTRONICS CO LTD·Filed 2009·Application pending·0 cites
- 4250USD930837SElectrocardiograph for a wireless communication deviceHEXACHECK INC·Filed 2019·Granted Sep 14, 2021·4 cites·1 claims
- 4350USD928963SElectrocardiograph for a wireless communication deviceHEXACHECK INC·Filed 2019·Granted Aug 24, 2021·4 cites·1 claims
- 4450USD928325SRingshaped electrocardiographic deviceHEXACHECK INC·Filed 2019·Granted Aug 17, 2021·4 cites·1 claims
- 4550US8107059B2Non-invasive probe for measuring body components and a non-invasive body component measurement system including the non-invasive probeHWANG IN-DUK·Filed 2007·Granted Jan 31, 2012·1 cites·17 claims
- 4650US7851740B2Portable body fat measurement device, method, and medium, using side-view light sourcesSAMSUNG ELECTRONICS CO LTD·Filed 2007·Granted Dec 14, 2010·0 cites·27 claims
- 4750US6625480B2Apparatus and method for measuring a concentration of a component of a target materialSAMSUNG ELECTRONICS CO LTD·Filed 2002·Granted Sep 23, 2003·4 cites·48 claims
- 4849US7987055B2Body fat measurement device and body fat measurement result providing methodSAMSUNG ELECTRONICS CO LTD·Filed 2007·Granted Jul 26, 2011·0 cites·28 claims
- 4948US9046460B2Particle measuring apparatus and measuring method using the sameLEE YONG KOO·Filed 2011·Granted Jun 2, 2015·0 cites·17 claims
- 5048US2021137392A1Electrocardiogram measurement method and system using wearable deviceWELLBEINGSOFT INC·Filed 2019·Application pending·0 cites
Showing the top 50 of 66 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when In-Duk Hwang files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →