Yuichi Akiyama
74Patents
14h-index
42Co-inventors
84Inventor score
Filing activity: Feb 23, 1984 → Jul 9, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8472810B2 | Optical signal transmitter and method for controlling polarization multiplexed optical signal | Electricity | 58 | Active |
| US9419720B2 | Optical signal transmitter | Electricity | 52 | Active |
| US8412047B2 | Polarization multiplexed light transmitter and control method thereof | Electricity | 51 | Active |
| US6661974B1 | Optical transmitter and optical transmission system | Electricity | 48 | Expired |
| US7817923B2 | Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them | Electricity | 27 | Active |
| US6728491B1 | Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling method | Electricity | 23 | Expired |
| US8249464B2 | Optical receiver and method for optical reception | Electricity | 22 | Active |
| US8879925B2 | Optical transmitter and optical transmission method | Electricity | 21 | Active |
| US5483517A | Multiplex transmission apparatus | Performing Operations; Transporting | 21 | Expired |
| US7657190B2 | Optical transmitter apparatus | Electricity | 17 | Active |
| US5982530A | Apparatus for driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line | Electricity | 15 | Expired |
| US6262828A | Method and apparatus of driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line | Electricity | 14 | Expired |
| US5633537A | Multiplex transmission apparatus | Performing Operations; Transporting | 14 | Expired |
| US8582981B2 | Optical transmitter and control method therefor | Electricity | 14 | Active |
| US7848659B2 | Optical transmitting apparatus and optical communication system | Electricity | 12 | Active |
| US5973816A | Method and apparatus of driving an optical modulator to measure, and compensation for dispersion in an optical transmission line | Electricity | 10 | Expired |
| US8145069B2 | Optical transmitter | Electricity | 9 | Active |
| US4614230A | Heat exchanger | Emerging Cross-Sectional Technologies | 9 | Expired |
| US8565616B2 | Polarized-wave-multiplexing optical transmitter and control method of polarized-wave-multiplexed optical signal | Electricity | 8 | Active |
| US7603007B2 | Quadrature phase-shift keying modulator and phase shift amount controlling method for the same | Physics | 7 | Active |
| US8457503B2 | Optical transmitter apparatus | Electricity | 7 | Active |
| US7907324B2 | Optical modulator and controlling method and apparatus thereof | Electricity | 7 | Active |
| US7773283B2 | Optical modulation device and optical modulation method | Electricity | 7 | Active |
| US7035548B2 | Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling method | Electricity | 7 | Expired |
| US8364038B2 | Polarization multiplexed optical transmitter and method for controlling polarization multiplexed optical signal | Electricity | 6 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.