Inventor
CHOI SANG H
US38 patents
⚠️ This page may combine multiple inventors who share the name “CHOI SANG H”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NASA
26 patentsUS7906358B2Mar 15, 2011
Epitaxial growth of cubic crystalline semiconductor alloys on basal plane of trigonal or hexagonal crystal
NASA12 citations92
US8044294B2Oct 25, 2011
Thermoelectric materials and devices
NASA21 citations90
US7341883B2Mar 11, 2008
Silicon germanium semiconductive alloy and method of fabricating same
NASA12 citations84
US10985676B2Apr 20, 2021
High performance electric generators boosted by nuclear electron avalanche (NEA)
NASA7 citations83
US8020805B2Sep 20, 2011
High altitude airship configuration and power technology and method for operation of same
NASA12 citations83
US11721451B2Aug 8, 2023
Thermionic power cell
NASA2 citations72
US11646679B2May 9, 2023
High performance electric generators boosted by nuclear electron avalanche (NEA)
NASA2 citations72
US11004666B2May 11, 2021
Portable miniaturized thermionic power cell with multiple regenerative layers
NASA2 citations72
US11037687B2Jun 15, 2021
Co-60 breeding reactor tandem with thermionic avalanche cell
NASA3 citations64
US12252780B2Mar 18, 2025
Growth method of highly twinned SiGe alloy on the basal plane of trigonal substrate under electron beam irradiation
NASA0 citations62
US12122539B2Oct 22, 2024
NTAC augmented nuclear electric propulsion and/or nuclear thermal propulsion
NASA0 citations62
US11980100B2May 7, 2024
Metallic junction thermoelectric generator
NASA0 citations62
US11581468B2Feb 14, 2023
Selective and direct deposition technique for streamlined CMOS processing
NASA0 citations62
US11094425B2Aug 17, 2021
Thermionic power cell
NASA0 citations62
US11063198B2Jul 13, 2021
Metallic junction thermoelectric generator
NASA0 citations62
US10886452B2Jan 5, 2021
Selective and direct deposition technique for streamlined CMOS processing
NASA0 citations62
US8018815B2Sep 13, 2011
Micro-Fresnel zone plate optical devices using densely accumulated ray points
NASA2 citations62
US11979100B2May 7, 2024
High performance electric generators boosted by nuclear electron avalanche (NEA)
NASA0 citations61
US11670432B2Jun 6, 2023
Multi-layered radio-isotope for enhanced photoelectron avalanche process
NASA0 citations57
US11257604B2Feb 22, 2022
Multi-layered radio-isotope for enhanced photoelectron avalanche process
NASA0 citations57
US10947639B2Mar 16, 2021
Molten target sputtering (MTS) deposition for enhanced kinetic energy and flux of ionized atoms
NASA0 citations52
US11299820B2Apr 12, 2022
Electron beam heating and atomic surface restructuring of sapphire surface
NASA0 citations51
US7998368B2Aug 16, 2011
Aqueous solution dispersement of carbon nanotubes
NASA0 citations51
US7379231B2May 27, 2008
Ferroelectric Light Control Device
NASA1 citations51
US7375808B2May 20, 2008
Method and system for sensing and identifying foreign particles in a gaseous environment
NASA0 citations42
US10651034B2May 12, 2020
Thermal absorption coating on sapphire for epitaxial process
NASA0 citations41
PARK YEONJOON
5 patentsUS8226767B2Jul 24, 2012
Hybrid bandgap engineering for super-hetero-epitaxial semiconductor materials, and products thereof
PARK YEONJOON14 citations92
US8094306B2Jan 10, 2012
Micro ring grating spectrometer with adjustable aperture
PARK YEONJOON2 citations62
US8294989B2Oct 23, 2012
Apparatus and method for creating a photonic densely-accumulated ray-point
PARK YEONJOON1 citations51
US8089677B2Jan 3, 2012
Dynamic optical grating device and associated method for modulating light
PARK YEONJOON1 citations51
US8059273B2Nov 15, 2011
Micro spectrometer for parallel light and method of use
PARK YEONJOON1 citations51