Issued Patents All Time
Showing 201–225 of 225 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7254705 | Service providing system in which services are provided from service provider apparatus to service user apparatus via network | Kaoru Yokota, Makoto Tatebayashi | 2007-08-07 |
| 7233662 | Numerical array output device, a numerical array output method, an encryption device, and a decryption device | Yuichi Futa, Kaoru Yokota, Makoto Tatebayashi | 2007-06-19 |
| 7219232 | Method of providing information via a communication network and information providing system | Kaoru Yokota | 2007-05-15 |
| 7212633 | Expansion key generating device, encryption device and encryption system | Kaoru Yokota | 2007-05-01 |
| 7209555 | Elliptic curve converting device, elliptic curve converting method, elliptic curve utilization device and elliptic curve generating device | Yuichi Futa | 2007-04-24 |
| 7194091 | Content using system | Akio Higashi, Katsumi Tokuda, Mitsuhiro Inoue | 2007-03-20 |
| 7155610 | Cryptocommunication system, transmission apparatus, and reception apparatus | Masato Yamamichi, Yuichi Futa, Makoto Tatebayashi | 2006-12-26 |
| 7155607 | Method for authentication between apparatuses using challenge and response system | Kaoru Yokota, Makoto Tatebayashi | 2006-12-26 |
| 7130422 | Information security device, prime number generation device, and prime number generation method | Yuichi Futa, Takatoshi Ono | 2006-10-31 |
| 7051924 | Value holding system, value holding method, value holding program, and transaction system | Toshihisa Nakano | 2006-05-30 |
| 7023362 | Positional information storage system and method, semiconductor memory, and program | Yuichi Futa, Makoto Tatebayashi | 2006-04-04 |
| 7020636 | Storage-medium rental system | Masataka Minami, Masaya Yamamoto | 2006-03-28 |
| 6995692 | Data converter and method thereof | Masato Yamamichi, Makoto Tatebayashi, Makoto Usui, Kaoru Yokota | 2006-02-07 |
| 6994263 | IC card | Eiji Ueda, Futoshi Nakabe, Masahiro Kawasaki, Shizuka Sakamoto | 2006-02-07 |
| 6917684 | Method of encryption and decryption with block number dependant key sets, each set having a different number of keys | Makoto Tatebayashi, Kaoru Yokota, Fumihiko Sano, Naoki Endo | 2005-07-12 |
| 6570989 | CRYPTOGRAPHIC PROCESSING APPARATUS, CRYPTOGRAPHIC PROCESSING METHOD, AND STORAGE MEDIUM STORING CRYPTOGRAPHIC PROCESSING PROGRAM FOR REALIZING HIGH-SPEED CRYPTOGRAPHIC PROCESSING WITHOUT IMPAIRING SECURITY | Kaoru Yokota | 2003-05-27 |
| 6459792 | Block cipher using key data merged with an intermediate block generated from a previous block | Natsume Matsuzaki, Makoto Tatebayashi, Masakatsu Maruyama | 2002-10-01 |
| 6304657 | Data encryption apparatus using odd number of shift-rotations and method | Kaoru Yokota, Atsuko Miyaji | 2001-10-16 |
| 6289314 | Pay information providing system for descrambling information from plural sources and rescrambling the information before sending to a terminal or terminals | Natsume Matsuzaki, Makoto Tatebayashi | 2001-09-11 |
| 6160890 | Secret key transfer method which is highly secure and can restrict the damage caused when the secret key is leaked or decoded | Makoto Tatebayashi, Takehisa Kato, Naoki Endoh, Koichi Hirayama | 2000-12-12 |
| 6009174 | Secret key transfer method which is highly secure and can restrict the damage caused when the secret key is leaked or decoded | Makoto Tatebayashi, Takehisa Kato, Naoki Endoh, Koichi Hirayama | 1999-12-28 |
| 4635210 | Method of and apparatus for detecting crack condition | Kouki Shiohata, Kazuo Satoh, Katsuaki Kikuchi, Ryoichi Kaneko | 1987-01-06 |
| 4453407 | Vibration diagnosis method and apparatus for rotary machines | Kazuo Sato, Masakazu Takasumi, Kouki Shiohata, Motohiro Shiga, Fumio Fujisawa | 1984-06-12 |
| 4448077 | Vibration diagnosis method for rotary machine | Kazuo Sato, Masakazu Takasumi, Motohiro Shiga, Koki Shiohata, Fumio Fujisawa | 1984-05-15 |
| 4435770 | Vibration diagnosing method and apparatus for a rotary machine | Koki Shiohata, Fumio Fujisawa, Motohiro Shiga, Kazuo Sato, Masakazu Takasumi | 1984-03-06 |