Hiroaki Nasu
33Patents
7h-index
26Co-inventors
69Inventor score
Filing activity: Oct 13, 1992 → Apr 17, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6088262A | Semiconductor device and electronic equipment having a non-volatile memory with a security function | Physics | 120 | Expired |
| US6121719A | Spark plug having a multi-layered electrode | Electricity | 26 | Expired |
| US6528929B1 | Spark plug with iridium-based alloy chip | Electricity | 14 | Expired |
| US6411550B1 | Semiconductor integrated-circuit device | Physics | 13 | Expired |
| US5548696A | Image processing apparatus | Physics | 10 | Expired |
| US6236148A | Spark plug with specific metal shell coating | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US6388924B1 | Semiconductor integrated device and electronic apparatus mounted with the device | Physics | 10 | Expired |
| US6846416B2 | Process for treating chromate waste liquid | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6538365B2 | Metal member with chromate coat, spark plug with chromate coat and manufacturing methods thereof | Chemistry; Metallurgy | 6 | Expired |
| US6768249B1 | Spark plug and producing method therefor | Chemistry; Metallurgy | 6 | Expired |
| US5309560A | Data selection device | Physics | 5 | Expired |
| US7420604B2 | Image-processing device with image-pickup validity indication and processing method thereof | Electricity | 4 | Active |
| US6437493B2 | Glow plug and spark plug, and manufacturing method therefor | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US7122947B2 | Glow plug and spark plug, and manufacturing method therefor | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US7080785B2 | Image-processing device, image-processing method and solid-state image-pickup device | Electricity | 3 | Expired |
| US7492402B2 | Image-processing device, image-processing method and solid-state image pickup device | Electricity | 3 | Expired |
| US8421324B2 | Spark plug, metal shell for spark plug, and method of manufacturing spark plug | Emerging Cross-Sectional Technologies | 2 | Active |
| US8593046B2 | Spark plug having a novel nickel coating for the metal shell | Electricity | 2 | Active |
| US8704434B2 | Spark plug and method of manufacturing the same | Electricity | 2 | Active |
| US8477934B2 | Pairing computation device, pairing computation method and recording medium storing pairing computation program | Electricity | 2 | Active |
| US6688932B2 | Method for manufacturing spark plug and caulking metallic mold | Chemistry; Metallurgy | 2 | Expired |
| US6766408B2 | Semiconductor integrated circuit and method for writing into non-volatile memory using a program received by external communication | Physics | 2 | Expired |
| US8716924B2 | Spark plug having stress corrosion cracking resistance | Electricity | 1 | Active |
| US8946976B2 | Spark plug | Electricity | 1 | Active |
| US10303810B2 | Problem structure extraction support system, problem structure extraction support method, and program | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.