Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12198167 | Quantum cryptographic device, quantum cryptographic communication fee calculation system, and quantum cryptographic communication fee calculation method | Mamiko Kujiraoka, Yoshimichi Tanizawa, 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 | Yoshimichi Tanizawa, Toshiki NAKASHIMA, Mari Matsumoto | 2024-06-04 |
| 11764952 | Application-key management system, application-key management device, application-key management method, and computer program product | Yoshimichi Tanizawa, Mamiko Kujiraoka, Akira Murakami, Ririka Takahashi | 2023-09-19 |
| 11265157 | Quantum communication device, quantum communication system, and quantum communication method | Yoshimichi Tanizawa | 2022-03-01 |
| 11115198 | Key generation device, key generation method, and computer program product | Ririka Takahashi, Yoshimichi Tanizawa, Mamiko Kujiraoka, Akira Murakami | 2021-09-07 |
| 10348492 | Quantum key distribution device, quantum key distribution system, and quantum key distribution method | Yoshimichi Tanizawa, Hideaki Sato, Ririka Takahashi, Akira Murakami | 2019-07-09 |
| 10256838 | Decoding apparatus, decoding method, and computer program product | — | 2019-04-09 |
| 9652620 | Quantum communication device, quantum communication method, and computer program product | Yoshimichi Tanizawa | 2017-05-16 |
| 9569731 | Quantum communication device, quantum communication method, and computer program product | Yoshimichi Tanizawa | 2017-02-14 |
| 9240805 | Parity check matrix creation method, encoding apparatus, and recording/reproduction apparatus | Akihito Ogawa, Hironori Uchikawa | 2016-01-19 |
| 9117485 | Signal processing apparatus capable of suppressing non-linear noise component during reading optical recording medium | Akihito Ogawa | 2015-08-25 |
| 9087523 | Information recording medium, information reproducing apparatus, management information reproducing method, information recording/reproducing apparatus and identification information reproducing/recording method | Akihito Ogawa, Kazuo Watabe, Hideaki Okano, Takashi Usui, Hidefumi Takamine +1 more | 2015-07-21 |
| 9064506 | Writable information recording and reproducing apparatus | Hideaki Okano, Kazuo Watabe, Chikara Tanioka, Akihito Ogawa, Takashi Usui | 2015-06-23 |
| 8614936 | Pickup head, information recording method and reproducing method | Kazuo Watabe, Hideaki Okano, Takashi Usui, Chikara Tanioka, Akihito Ogawa | 2013-12-24 |
| 8582413 | Optical pickup and optical disk apparatus | Chikara Tanioka, Kazuo Watabe, Hideaki Okano, Akihito Ogawa, Takashi Usui | 2013-11-12 |
| 8553508 | Focus servo control device, and information recording/reproducing device using the same | Takashi Usui, Kazuo Watabe, Hideaki Okano, Chikara Tanioka, Akihito Ogawa | 2013-10-08 |