Hiroyuki Fukuyama
34Patents
6h-index
59Co-inventors
72Inventor score
Filing activity: Aug 21, 1992 → Feb 3, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6510097B2 | DRAM interface circuit providing continuous access across row boundaries | Physics | 81 | Expired |
| US7114113B2 | Test circuit provided with built-in self test function | Physics | 27 | Expired |
| US6744076B2 | Single crystalline aluminum nitride film, method of forming the same, base substrate for group III element nitride film, light emitting device and surface acoustic wave device | Electricity | 20 | Expired |
| US5270592A | Clock supply circuit layout in a circuit area | Electricity | 13 | Expired |
| US6025740A | Clock feeding circuit and method for adjusting clock skew | Electricity | 8 | Expired |
| US7054403B2 | Phase-Locked Loop | Electricity | 8 | Expired |
| US7220314B2 | Single crystalline aluminum nitride film, method of forming the same, base substrate for group III element nitride film, light emitting device and surface acoustic wave device | Electricity | 6 | Expired |
| US6826101B2 | Semiconductor device and method for testing the same | Physics | 5 | Expired |
| US7363558B2 | Semiconductor device and method for testing the same | Physics | 5 | Expired |
| US7249295B2 | Test circuit for semiconductor device | Physics | 5 | Expired |
| US7338555B2 | Highly crystalline aluminum nitride multi-layered substrate and production process thereof | Chemistry; Metallurgy | 4 | Expired |
| US7333372B2 | Reset circuit and integrated circuit device with reset function | Physics | 4 | Expired |
| US10243664B2 | Optical modulator driver circuit and optical transmitter | Electricity | 3 | Active |
| US7437645B2 | Test circuit for semiconductor device | Physics | 3 | Active |
| US9614124B2 | Substrate having annealed aluminum nitride layer formed thereon and method for manufacturing the same | Electricity | 2 | Active |
| US7528462B2 | Aluminum nitride single-crystal multi-layered substrate | Electricity | 2 | Expired |
| US9143110B2 | Automatic gain control circuit | Electricity | 1 | Active |
| US11336491B2 | Decision feedback equalizer | Electricity | 1 | Active |
| US8137825B2 | Aluminum nitride single crystal film, aluminum nitride single crystal multi-layer substrate and manufacturing processes thereof | Chemistry; Metallurgy | 1 | Active |
| US10393052B2 | Injector control device and injector control method | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US11362669B2 | Track and hold circuit | Electricity | 1 | Active |
| US10570996B2 | Shoe for chain guide and for chain tensioner arm, and chain guide and chain tensioner arm provided with said shoe | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US8397132B2 | Memory device | Physics | 1 | Active |
| US8735905B2 | Method for producing aluminum nitride crystals | Electricity | 0 | Active |
| US11451253B2 | Signal generator and signal generation method | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.