Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7098895 | Optical trackball device and electronic apparatus | Takefumi Inoue | 2006-08-29 |
| 7076668 | Data usage controlling apparatus that prevents the unauthorized use of main data by updating a type 1 and a type 2 key used for protecting the main data in accordance with usage of the main data | Shunji Harada | 2006-07-11 |
| 6963644 | Multi-word arithmetic device for faster computation of cryptosystem calculations | Natsume Matsuzaki, Yasuo Okumura | 2005-11-08 |
| 6868404 | DIGITAL DATA RECORDING DEVICE, DIGITAL DATA MEMORY DEVICE, AND DIGITAL DATA UTILIZING DEVICE FOR CONVERTING MANAGEMENT INFORMATION WHICH CONTAINS RESTRICTIVE INFORMATION USING A DIFFERENT KEY IN EACH MANAGEMENT INFORMATION SEND/RECEIVE SESSION | Shunji Harada | 2005-03-15 |
| 6567832 | Device, method, and storage medium for exponentiation and elliptic curve exponentiation | Natsume Matsuzaki | 2003-05-20 |
| 6523115 | ENCRYPTION DEVICE, DECRYPTION DEVICE, ENCRYPTION METHOD, DECRYPTION METHOD, CRYPTOGRAPHY SYSTEM, COMPUTER-READABLE RECORDING MEDIUM STORING ENCRYPTION PROGRAM, AND COMPUTER-READABLE RECORDING MEDIUM STORING DECRYPTION PROGRAM WHICH PERFORM ERROR DIAGNOSIS | Takeshi Saijo | 2003-02-18 |
| 6496930 | Message receiving apparatus and message transmitting apparatus | Takeshi Saijo, Makoto Tatebayashi, Syunji Harada, Yasuo Okumura | 2002-12-17 |
| 6366940 | High-speed modular multiplication apparatus achieved in small circuit | Natsume Matsuzaki, Hiroshi Kashiwa | 2002-04-02 |
| 6263081 | Elliptic curve calculation apparatus capable of calculating multiples at high speed | Atsuko Miyaji | 2001-07-17 |
| 4688540 | Semiconductor wafer dicing machine | — | 1987-08-25 |
| 4652135 | Article holding apparatus and its use | — | 1987-03-24 |
| 4617766 | Grinding wheel for flat plates | Shinji Sekiya | 1986-10-21 |
| 4567694 | Grinding wheel for grinding the flat surface of a hard and brittle material | Shinji Sekiya | 1986-02-04 |
| 4558686 | Machining device equipped with blade inspecting means | — | 1985-12-17 |
| 4545154 | Grinding wheel for flat plates | Shinji Sekiya | 1985-10-08 |
| 4445300 | Method for grinding flat plates | Shinji Sekiya | 1984-05-01 |
| 4411107 | Grinding wheel for flat plates | Shinji Sekiya | 1983-10-25 |