Hiroaki Ohta
38Patents
6h-index
66Co-inventors
72Inventor score
Filing activity: Oct 28, 1981 → Oct 31, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8017932B2 | Light-emitting device | Electricity | 213 | Active |
| US8044434B2 | Semiconductor device employing group III-V nitride semiconductors and method for manufacturing the same | Electricity | 33 | Active |
| US4394340A | Method of producing thin-walled endless belt | Performing Operations; Transporting | 26 | Expired |
| US5637130A | Method and furnace for drawing optical fibers | Chemistry; Metallurgy | 17 | Expired |
| US7750369B2 | Nitride semiconductor device | Electricity | 13 | Active |
| US5109368A | Optical device using a resilient member | Physics | 12 | Expired |
| US6546760B1 | Optical fiber drawing furnace with a zig zag heating element | Chemistry; Metallurgy | 6 | Expired |
| US8761218B2 | Aluminum gallium nitride barriers and separate confinement heterostructure (SCH) layers for semipolar plane III-nitride semiconductor-based light emitting diodes and laser diodes | Electricity | 6 | Active |
| US7999286B2 | MIS field effect transistor and method for manufacturing the same | Electricity | 5 | Active |
| US8481991B2 | Anisotropic strain control in semipolar nitride quantum wells by partially or fully relaxed aluminum indium gallium nitride layers with misfit dislocations | Electricity | 4 | Active |
| US7736785B2 | Fuel cell | Emerging Cross-Sectional Technologies | 4 | Active |
| US11784454B1 | High intensity pulse laser generation system and method | Electricity | 2 | Active |
| US9159553B2 | Semipolar or nonpolar nitride-based devices on partially or fully relaxed alloys with misfit dislocations at the heterointerface | Electricity | 1 | Active |
| US5737150A | Magnetic disk unit with an impact force applying mechanism | Physics | 1 | Expired |
| US9368826B2 | Fuel cell stack | Emerging Cross-Sectional Technologies | 1 | Active |
| US12160082B1 | Airplane configured with a high intensity pulse laser generation system and method | Electricity | 1 | Active |
| US5624474A | Optical fiber preform manufacturing apparatus which measures a vertical load with three cells | Chemistry; Metallurgy | 1 | Expired |
| US8124982B2 | Semiconductor light-emitting element and method for fabrication the same | Electricity | 1 | Active |
| US7843980B2 | Semiconductor laser diode | Electricity | 1 | Active |
| US8692105B2 | III-V nitride-based thermoelectric device | Electricity | 0 | Active |
| US8968950B2 | Method of starting operation of solid polymer electrolyte fuel cell | Emerging Cross-Sectional Technologies | 0 | Active |
| US12387853B1 | Synchronized light source for laser fusion system and method for energy generation | Physics | 0 | Active |
| US7488970B2 | Semiconductor device | Electricity | 0 | Active |
| US11488867B2 | Chip singulation method | Electricity | 0 | Active |
| US9905880B2 | Fuel cell stack | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.