Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12341879 | Key management device, quantum cryptography communication system, and computer program product | Yoshimichi Tanizawa | 2025-06-24 |
| 12341881 | Quantum cryptography communication system, quantum cryptography communication device, key management device, and computer program product | Yoshimichi Tanizawa, Alexander Dixon | 2025-06-24 |
| 12316747 | Key management device, quantum cryptography communication system, and program | Yu Yu, Yoshimichi Tanizawa | 2025-05-27 |
| 12231553 | Key management device, quantum cryptography communication system, and computer program product | Yu Yu, Yasuhiro Katsube, Yoshimichi Tanizawa, Yasuhiro Fujiyoshi | 2025-02-18 |
| 12198167 | Quantum cryptographic device, quantum cryptographic communication fee calculation system, and quantum cryptographic communication fee calculation method | Kazuaki Doi, Mamiko Kujiraoka, Yoshimichi Tanizawa, Hideaki Sato, Akira Murakami | 2025-01-14 |
| 11764952 | Application-key management system, application-key management device, application-key management method, and computer program product | Kazuaki Doi, Yoshimichi Tanizawa, Mamiko Kujiraoka, Akira Murakami | 2023-09-19 |
| 11115198 | Key generation device, key generation method, and computer program product | Yoshimichi Tanizawa, Kazuaki Doi, Mamiko Kujiraoka, Akira Murakami | 2021-09-07 |
| 10439807 | Communication device, communication system, and communication method | Yoshimichi Tanizawa | 2019-10-08 |
| 10348492 | Quantum key distribution device, quantum key distribution system, and quantum key distribution method | Yoshimichi Tanizawa, Hideaki Sato, Kazuaki Doi, Akira Murakami | 2019-07-09 |
| 10341097 | Communication device, quantum key distribution system, quantum key distribution method, and computer program product | Yoshimichi Tanizawa | 2019-07-02 |
| 10223182 | Communication device, communication system, and computer program product | — | 2019-03-05 |
| 9928370 | Communication device, communication method, computer program product, and communication system | Yoshimichi Tanizawa, Hideaki Sato, Shinichi Kawamura, Shinya Murai | 2018-03-27 |
| 9768954 | Quantum key distribution device, quantum key distribution system, and computer program product | Yoshimichi Tanizawa | 2017-09-19 |
| 9509589 | Communication device, communication system, communication method, and computer program product | Yoshimichi Tanizawa, Hideaki Sato | 2016-11-29 |
| 9455827 | Communication apparatus, computer program product, and communication system | Yoshimichi Tanizawa, Hideaki Sato, Alex Dixon | 2016-09-27 |
| 9450929 | Communication device, communication system, and computer program product | Yoshimichi Tanizawa, Hideaki Sato | 2016-09-20 |
| 9356780 | Device, method, and system for encrypted communication by using encryption key | Yoshimichi Tanizawa, Hideaki Sato, Shinichi Kawamura, Shinya Murai | 2016-05-31 |
| 9350542 | Quantum key distribution device, quantum key distribution system, and quantum key distribution method | Yoshimichi Tanizawa | 2016-05-24 |