Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12216787 | Searchable encryption system, searchable encryption method, and non-transitory computer-readable recording medium | Takato Hirano, Yutaka Kawai, Satoshi Yasuda | 2025-02-04 |
| 12061604 | Searchable encryption system | Takato Hirano, Yutaka Kawai | 2024-08-13 |
| 11902418 | Registration device, search operation device, and data management device | Takato Hirano, Yutaka Kawai, Satoshi Yasuda | 2024-02-13 |
| 11831769 | Registration device, server device, searchable encryption system, and searchable encryption method | Takato Hirano, Yutaka Kawai | 2023-11-28 |
| 11824638 | Re-encryption device, method and computer readable medium to change the access range for ciphertext | Yutaka Kawai | 2023-11-21 |
| 11451372 | Privacy-preserving analysis device, privacy-preserving analysis system, privacy-preserving analysis method, and computer readable medium | Yutaka Kawai, Takato Hirano | 2022-09-20 |
| 11374742 | Conversion key generation device, ciphertext conversion device, privacy-preserving information processing system, conversion key generation method, ciphertext conversion method, and computer | Satoshi Yasuda, Yutaka Kawai, Ryo HIROMASA | 2022-06-28 |
| 11360978 | Search device, tag generation device, query generation device, searchable encryption system and computer readable medium | Yutaka Kawai | 2022-06-14 |
| 11349654 | Re-encryption key generation device, re-encryption device, re-encrypted ciphertext decryption device, and cryptographic system | Yutaka Kawai | 2022-05-31 |
| 11233629 | Registration apparatus, search operation apparatus, data management apparatus | Takato Hirano, Yutaka Kawai | 2022-01-25 |
| 11170123 | Registration terminal, key server, search system, and computer readable medium | Yutaka Kawai | 2021-11-09 |
| 11106740 | Search device, search system, search method, and computer readable medium | Yoichi Shibata | 2021-08-31 |
| 10936757 | Registration destination determination device, searchable encryption system, destination determination method, and computer readable medium | Takashi Ito, Nori Matsuda, Mitsuhiro Hattori, Yoichi Shibata, Takumi Mori +1 more | 2021-03-02 |
| 10872158 | Secret search system, secret search method, and computer readable medium | Kenichiro HAYASAKA, Yutaka Kawai, Takato Hirano | 2020-12-22 |
| 10778431 | Encrypted text conversion device, computer readable medium, and encryption text conversion method | Yutaka Kawai, Takato Hirano | 2020-09-15 |
| 6753099 | Phosphor and imaging device using the same | Shin Imamura, Masatoshi Shiiki, Masaaki Komatsu, Hidetsugu Matsukiyo, Takashi Hase +1 more | 2004-06-22 |
| 5363013 | Phosphor and cathode-ray tube using the same | Hidetsugu Matsukiyo, Teruki Suzuki, Hajime Yamamoto, Yasuhiko Uehara, Yasukazu Morita +5 more | 1994-11-08 |
| 5177401 | Phosphor and cathode-ray tube using the same | Hidetsugu Matsukiyo, Teruki Suzuki, Hajime Yamamoto, Yasuhiko Uehara, Yasukazu Morita +5 more | 1993-01-05 |
| 4507669 | Thermosensitive recording sheet | Hiroshi Sakamoto, Takanori Motosugi, Norihiko Inaba | 1985-03-26 |
| 4411979 | Diazo type thermosensitive recording material | Masanaka Nagamoto, Susumu Iwata | 1983-10-25 |