Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10411890 | Authentication system, authentication side device, and security system | — | 2019-09-10 |
| 9294271 | Quantum-key-distribution receiving device and method for using single-photon detector | — | 2016-03-22 |
| 9030731 | Quantum entangled photon pair generator | — | 2015-05-12 |
| 8923517 | Multi-terminal quantum key distribution system | — | 2014-12-30 |
| 8676063 | Quantum correlated photon pair generating device and method | — | 2014-03-18 |
| 8433200 | Method and system for quantum key delivery utilizing a conversion efficiency of DFG | — | 2013-04-30 |
| 8331798 | Optical m-ary modulator | — | 2012-12-11 |
| 8260149 | Carrier-suppressed optical pulse train generating device | — | 2012-09-04 |
| 8242435 | Quantum entangled photon pair generating device | — | 2012-08-14 |
| 8149501 | Quantum entangled photon pair generating device | — | 2012-04-03 |
| 8107154 | Optical modulator and optical signal generation apparatus | Hitoshi Murai | 2012-01-31 |
| 8078062 | Carrier-suppressed optical pulse train generating device and method | — | 2011-12-13 |
| 8073337 | Optical clock recovery apparatus and method and birefringent medium | — | 2011-12-06 |
| 7873079 | Carrier-suppressed optical pulse train generation method and mode-locked semiconductor laser diode for realizing this method | — | 2011-01-18 |
| 7646985 | Optical clock signal extraction device and optical clock signal extraction method | — | 2010-01-12 |
| 7577357 | Optical switch | — | 2009-08-18 |
| 7508852 | Passive mode-locked semiconductor laser diode, and optical clock signal extracting device | — | 2009-03-24 |
| 7409157 | Optical switch | — | 2008-08-05 |
| 7133581 | Optical switch | — | 2006-11-07 |
| 6954559 | Re-generator of optical clock signal | — | 2005-10-11 |
| 6542522 | Mode locking semiconductor laser | — | 2003-04-01 |