Hitoshi Sumida
29Patents
6h-index
31Co-inventors
69Inventor score
Filing activity: Aug 15, 1994 → Jan 31, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6057726A | Output circuit for power IC with high breakdown voltage | Electricity | 18 | Expired |
| US5485023A | Insulated gate bipolar transistor | Electricity | 18 | Expired |
| US6441432B1 | High voltage lateral semiconductor device | Electricity | 16 | Expired |
| US9761545B2 | Isolator and method of manufacturing isolator | Electricity | 9 | Active |
| US5572055A | Insulated-gate bipolar transistor with reduced latch-up | Electricity | 8 | Expired |
| US9818845B2 | MOS-driven semiconductor device and method for manufacturing MOS-driven semiconductor device | Electricity | 7 | Active |
| US9318784B2 | Isolator and isolator manufacturing method | Electricity | 4 | Active |
| US8014118B2 | Load driving circuit, driver IC having a load driving circuit, and plasma display panel having a driver IC | Physics | 4 | Active |
| US10727180B2 | Resistive element and method of manufacturing the resistive element | Electricity | 3 | Active |
| US5624855A | Process of producing insulated-gate bipolar transistor | Electricity | 3 | Expired |
| US9117797B2 | High-voltage semiconductor device | Electricity | 2 | Active |
| US9608072B2 | Semiconductor device | Electricity | 2 | Active |
| US7960937B2 | Inverter unit, integrated circuit chip, and vehicle drive apparatus | Emerging Cross-Sectional Technologies | 2 | Active |
| US10217765B2 | Semiconductor integrated circuit | Electricity | 1 | Active |
| US8664909B2 | Inverter unit, integrated circuit chip, and vehicle drive apparatus | Emerging Cross-Sectional Technologies | 1 | Active |
| US8742802B2 | Gate driving circuit | Electricity | 1 | Active |
| US11189685B2 | Resistance element and manufacturing method of resistance element | Electricity | 0 | Active |
| US8928368B2 | Gate driving circuit | Electricity | 0 | Active |
| US9698667B2 | Semiconductor device and power converter equipment | Electricity | 0 | Active |
| US8405343B2 | Inverter unit, integrated circuit chip, and vehicle drive apparatus | Emerging Cross-Sectional Technologies | 0 | Active |
| US10725087B2 | Semiconductor integrated device and gate screening test method of the same | Physics | 0 | Active |
| US9553185B2 | MOS-driven semiconductor device and method for manufacturing MOS-driven semiconductor device | Electricity | 0 | Active |
| US11699764B2 | Semiconductor device and method of manufacturing the same | Electricity | 0 | Active |
| US11233052B2 | Method of manufacturing semiconductor integrated circuit | Electricity | 0 | Active |
| US10825812B2 | Semiconductor integrated circuit | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.