Issued Patents 2025
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12341879 | Key management device, quantum cryptography communication system, and computer program product | Ririka Takahashi | 2025-06-24 |
| 12341881 | Quantum cryptography communication system, quantum cryptography communication device, key management device, and computer program product | Ririka Takahashi, Alexander Dixon | 2025-06-24 |
| 12316747 | Key management device, quantum cryptography communication system, and program | Yu Yu, Ririka Takahashi | 2025-05-27 |
| 12231553 | Key management device, quantum cryptography communication system, and computer program product | Yu Yu, Yasuhiro Katsube, Ririka Takahashi, Yasuhiro Fujiyoshi | 2025-02-18 |
| 12206770 | Quantum cryptography storage system, distribution control device, and computer program product | Yasuhiro Fujiyoshi | 2025-01-21 |
| 12198167 | Quantum cryptographic device, quantum cryptographic communication fee calculation system, and quantum cryptographic communication fee calculation method | Kazuaki Doi, Mamiko Kujiraoka, Hideaki Sato, Ririka Takahashi, Akira Murakami | 2025-01-14 |