Issued Patents All Time
Showing 51–75 of 90 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6707465 | Data processing apparatus and method, and storage medium | Takeshi Yamazaki | 2004-03-16 |
| 6694040 | Data processing apparatus and method, and memory medium | Junichi Hayashi | 2004-02-17 |
| 6674874 | Data processing apparatus and method and storage medium | Jun Yoshida | 2004-01-06 |
| 6671675 | Metering the flow of electronic information | — | 2003-12-30 |
| 6560339 | Electronic watermarking method, digital information distribution system using such method, and storage medium storing program of such method | — | 2003-05-06 |
| 6535616 | Information processing apparatus, method and memory medium therefor | Junichi Hayashi | 2003-03-18 |
| 6516318 | Management system and terminal apparatus to manage and control distribution and use of software and the like | Kenji Nakamura | 2003-02-04 |
| 6513118 | Electronic watermarking method, electronic information distribution system, image filing apparatus and storage medium therefor | — | 2003-01-28 |
| 6453296 | Electronic credit system and communication apparatus | — | 2002-09-17 |
| 6449378 | Data processing apparatus and method and storage medium | Jun Yoshida, Kenichi Nagasawa | 2002-09-10 |
| 6434746 | Accounting in an image transmission system based on a transmission mode and an accounting mode based on the transmission mode | Takayuki Nagashima | 2002-08-13 |
| 6434253 | Data processing apparatus and method and storage medium | Junichi Hayashi | 2002-08-13 |
| 6425081 | Electronic watermark system electronic information distribution system and image filing apparatus | — | 2002-07-23 |
| 6307940 | Communication network for encrypting/deciphering communication text while updating encryption key, a communication terminal thereof, and a communication method thereof | Takahisa Yamamoto | 2001-10-23 |
| 6275988 | Image transmission apparatus, image transmission system, and communication apparatus | Takayuki Nagashima, Toshiaki Suzuki | 2001-08-14 |
| 6272535 | System for enabling access to a body of information based on a credit value, and system for allocating fees | — | 2001-08-07 |
| 6144946 | Accounting device, communicating apparatus, and communication system | — | 2000-11-07 |
| 6134663 | Management system and terminal apparatus to manage and control distribution and use of software and the like | Kenji Nakamura | 2000-10-17 |
| 6088454 | Key management method, encryption system, and sharing digital signature system which have hierarchies | Takayuki Nagashima | 2000-07-11 |
| 5966449 | Method and network for communicating between a group of entities a text encrypted using an encryption key intrinsic to the group of entities in a network having a plurality of entities and a center | Takahisa Yamamoto | 1999-10-12 |
| 5937395 | Accounting apparatus, information receiving apparatus, and communication system | — | 1999-08-10 |
| 5909238 | Image transmission system with billing based on the kind of MPEG frame transmitted | Takayuki Nagashima | 1999-06-01 |
| 5828752 | Pseudo-random number generator and communication system employing the same | Takahisa Yamamoto | 1998-10-27 |
| 5774389 | Error correction apparatus | — | 1998-06-30 |
| 5742620 | GMD decoding apparatus and a method therefor | — | 1998-04-21 |