Ippei Shake
23Patents
5h-index
33Co-inventors
69Inventor score
Filing activity: Dec 1, 1998 → Nov 8, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7869428B2 | Packet transmission method and packet transmission device | Electricity | 33 | Active |
| US6587242B1 | Optical transmission system | Electricity | 23 | Expired |
| US6396601B1 | System for monitoring quality of optical signals having different bit rates | Electricity | 21 | Expired |
| US7200328B2 | Method and system for determining origin of optical signal quality degradation | Electricity | 5 | Expired |
| US7190752B2 | Data signal quality evaluation method and apparatus using high speed sampling | Electricity | 5 | Expired |
| US6720548B2 | Optical sampling waveform measuring apparatus aiming at achieving wider band | Physics | 3 | Expired |
| US8625588B2 | Packet transmission method and packet transmission device | Electricity | 2 | Active |
| US6842565B2 | Optical modulation/multiplexing circuit | Electricity | 1 | Expired |
| US11808473B2 | Action optimization device, method and program | Physics | 1 | Active |
| US7684697B2 | Optical signal quality monitoring circuit and optical signal quality monitoring method | Electricity | 1 | Active |
| US11861841B2 | Lane estimation device, method, and program | Physics | 1 | Active |
| US11877871B2 | Infectious disease prevention supporting device, method and program | Physics | 0 | Active |
| US12009106B2 | Emergency demand prediction device, emergency demand prediction method, and program | Physics | 0 | Active |
| US12055628B2 | Position coordinates estimation device, position coordinates estimation method, and program | Physics | 0 | Active |
| US7079765B2 | Optical wavelength division multiplex signal monitoring apparatus | Electricity | 0 | Expired |
| US11920937B2 | Sidewalk network information generation device, method and program | Electricity | 0 | Active |
| US11941890B2 | Sidewalk information generation device, method and program | Physics | 0 | Active |
| US6697395B2 | Sum frequency light generation method and sum frequency light generation apparatus adapatble for wide-band wavelength conversion | Physics | 0 | Expired |
| US11960499B2 | Sales data processing apparatus, method, and medium storing program for sales prediction | Physics | 0 | Active |
| US11417194B2 | Hand washing supporting device, method and program | Physics | 0 | Active |
| US11837084B2 | Traffic flow estimation apparatus, traffic flow estimation method, traffic flow estimation program, and storage medium storing traffic flow estimation program | Physics | 0 | Active |
| US12051279B2 | Lane pricing system, lane pricing device, method, and program | Physics | 0 | Active |
| US11222216B2 | Crosswalk detection device, method and program | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.