Issued Patents All Time
Showing 1–25 of 69 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12341881 | Quantum cryptography communication system, quantum cryptography communication device, key management device, and computer program product | Ririka Takahashi, Alexander Dixon | 2025-06-24 |
| 12341879 | Key management device, quantum cryptography communication system, and computer program product | Ririka Takahashi | 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 |
| 12003624 | Quantum cryptographic communication system, key management inspection device, key management inspection method, and computer program product | Kazuaki Doi, Toshiki NAKASHIMA, Mari Matsumoto | 2024-06-04 |
| 11936636 | Communication device, communication method, and communication system | Yasuyuki Tanaka | 2024-03-19 |
| 11824975 | Communication device, computer program product, and communication system using quantum key distribution | Masashi Ito | 2023-11-21 |
| 11764952 | Application-key management system, application-key management device, application-key management method, and computer program product | Kazuaki Doi, Mamiko Kujiraoka, Akira Murakami, Ririka Takahashi | 2023-09-19 |
| 11595197 | Communication device, communication method, and communication method for performing communication using shared quantum key | — | 2023-02-28 |
| 11265157 | Quantum communication device, quantum communication system, and quantum communication method | Kazuaki Doi | 2022-03-01 |
| 11115198 | Key generation device, key generation method, and computer program product | Ririka Takahashi, Kazuaki Doi, Mamiko Kujiraoka, Akira Murakami | 2021-09-07 |
| 10979220 | Communication device, communication method, and communication method for performing communication using shared quantum key | — | 2021-04-13 |
| 10630464 | Communication device, communication system, and communication method allocating shared keys to plural channels | — | 2020-04-21 |
| 10623180 | Communication device, communication method, and communication system | — | 2020-04-14 |
| 10567089 | Transmission device, multi-quantum communication system, and multi-quantum communication method | Akira Murakami | 2020-02-18 |
| 10439807 | Communication device, communication system, and communication method | Ririka Takahashi | 2019-10-08 |
| 10348492 | Quantum key distribution device, quantum key distribution system, and quantum key distribution method | Hideaki Sato, Kazuaki Doi, Ririka Takahashi, Akira Murakami | 2019-07-09 |
| 10341097 | Communication device, quantum key distribution system, quantum key distribution method, and computer program product | Ririka Takahashi | 2019-07-02 |
| 10291400 | Quantum key distribution device, quantum key distribution system, and quantum key distribution method | — | 2019-05-14 |
| 10291590 | Communication system, communication apparatus, communication method, and computer program product | Hideaki Sato | 2019-05-14 |
| 10103818 | Transmitting device, quantum communication system, and quantum communication method | Akira Murakami, Alex Dixon | 2018-10-16 |
| 10057058 | Quantum-key distribution apparatus, quantum-key distribution method, and computer program product | Akira Murakami | 2018-08-21 |
| 10020893 | Communication device, quantum key distribution system, quantum key distribution method, and computer program product | Akira Murakami, Alex Dixon | 2018-07-10 |