Issued Patents All Time
Showing 1–25 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11274417 | Hydraulic drive system of construction machine | Akihiro Kondo, Yoji Yudate | 2022-03-15 |
| 11035100 | Hydraulic drive system of construction machine | Akihiro Kondo | 2021-06-15 |
| 10900199 | Drive system of construction machine | Akihiro Kondo, Hideyasu Muraoka | 2021-01-26 |
| 10612212 | Hydraulic excavator drive system | Akihiro Kondo | 2020-04-07 |
| 10167613 | Hydraulic drive system of construction machine | Akihiro Kondo, Yoji Yudate | 2019-01-01 |
| 9129262 | Shop apparatus and purchaser apparatus | Takuya Yoshida, Minako Tada, Norikazu Hosaka, Koji Okada | 2015-09-08 |
| 8397291 | Access control system, device, and program | Shingo Miyazaki | 2013-03-12 |
| 8184807 | Content distribution/browsing system, content distribution apparatus, content browsing apparatus and program | Koji Okada, Norikazu Hosaka, Yoshihiro Fujii, Minako Tada | 2012-05-22 |
| 8077863 | Secret sharing apparatus, method, and program | Norikazu Hosaka, Yoshihiro Fujii, Minako Tada | 2011-12-13 |
| 8074068 | Secret sharing device, method, and program | Yoshihiro Fujii, Norikazu Hosaka, Minako Tada | 2011-12-06 |
| 7995763 | User apparatus and program | — | 2011-08-09 |
| 7700532 | Cleaning composition and method of cleaning therewith | Ichiro Hayashida, Hironori Mizuta | 2010-04-20 |
| 7519992 | Access control system, device, and program | Shingo Miyazaki | 2009-04-14 |
| 7433474 | Method and apparatus of enciphering and deciphering data using keys enciphered and deciphered with other keys | Naoki Endoh, Hiroaki Unno, Tadashi Kojima, Koichi Hirayama | 2008-10-07 |
| 7272717 | System of authentication, apparatus, program and method | Shingo Miyazaki, Naoki Endo, Daigo Yoshii, Koichi Noguchi, Hideo Shimizu +9 more | 2007-09-18 |
| 6751321 | Digital data reproduction device | Naoki Endoh, Kenji Shimoda | 2004-06-15 |
| 6556679 | Copy-guard system and information recording medium used in the same system | Taku Katoh, Kenjiro Endoh, Hisashi Yamada, Naoki Endoh | 2003-04-29 |
| 6438692 | Copy protection apparatus and information recording medium used in this copy protection apparatus | Taku Kato, Kenjiro Endoh, Hisashi Yamada, Naoki Endoh | 2002-08-20 |
| 6381331 | Information sending system and method for sending encrypted information | — | 2002-04-30 |
| 6347145 | Method and apparatus of enciphering and deciphering data using keys enciphered and deciphered with other keys | Naoki Endoh, Hiroaki Unno, Tadashi Kojima, Koichi Hirayama | 2002-02-12 |
| 6343281 | Device and method for preventing fraudulent copies of data containing encrypted copy-management information and recording medium | — | 2002-01-29 |
| 6327654 | Semiconductor integrated circuit for cryptographic process and encryption algorithm alternating method | Yukihito Oowaki, Hiroshige Fujii, Hideo Shimizu, Naoki Endo, Atsushi Masuda +3 more | 2001-12-04 |
| 6301663 | Copy protection apparatus and information recording medium used in this copy protection apparatus | Taku Kato, Kenjiro Endoh, Hisashi Yamada, Naoki Endoh | 2001-10-09 |
| 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, Motoji Ohmori, Naoki Endoh, Koichi Hirayama | 2000-12-12 |
| 6151394 | Encrypted communication system that limits the damage caused when a secret key has been leaked | Makoto Tatebayashi, Yoshihisa Fukushima, Naoki Endoh, Koichi Hirayama | 2000-11-21 |