Issued Patents All Time
Showing 51–68 of 68 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5739932 | Optical transmission system constructing method and system | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1998-04-14 |
| 5721727 | Control method and apparatus for path switching in ring network | Yoshihiro Ashi | 1998-02-24 |
| 5671074 | Optical multiplex transmission equipment and method | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1997-09-23 |
| 5600631 | Self-healing ring switch and method of controlling the same | Yoshihiro Ashi, Hiroyuki Fujita | 1997-02-04 |
| 5577037 | Method of processing inclusively STM signals and ATM signals and switching system employing the same | Yukio Nakano, Yoshihiro Ashi | 1996-11-19 |
| 5555477 | Optical transmission system constructing method and system | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1996-09-10 |
| 5550805 | Failure restoration method in a mesh network | Yukio Nakano, Yoshihiro Ashi | 1996-08-27 |
| 5534757 | Amplifying circuit for dynamic focus | — | 1996-07-09 |
| 5500756 | Optical fiber transmission system and supervision method of the same | Hideaki Tsushima, Shinya Sasaki, Yukio Nakano, Hiroyuki Nakano, Ryoji Tateyari +9 more | 1996-03-19 |
| 5475676 | Switch for self-healing ring | Yukio Nakano, Yoshihiro Ashi, Hiroyuki Fujita | 1995-12-12 |
| 5473598 | Routing method and apparatus for switching between routing and conversion tables based on selection information included in cells to be routed | Yukio Nakano, Yoshihiro Ashi, Tadayuki Kanno | 1995-12-05 |
| 5331639 | Method and apparatus for frame phase conversion of signal having frame structure | Yukio Nakano, Keiichi Ishida, Takashi Mori, Yoshihiro Ashi, Tadayuki Kanno +1 more | 1994-07-19 |
| 5315581 | Hit-less protection switching method and apparatus for ATM transmission lines | Yukio Nakano, Akihiko Takase, Junichirou Yanagi | 1994-05-24 |
| 5271006 | Frame aligner and method and system for control thereof | Yoshihiro Ashi, Tadayuki Kanno, Hiromi Ueda | 1993-12-14 |
| 5197063 | Circuit switching method and apparatus for time division network with various transmission speeds | Yukio Nakano, Tadayuki Kanno, Hiromi Ueda | 1993-03-23 |
| 5189668 | ATM switch and ATM multiplexer | Yukio Nakano, Yoshihiro Ashi, Tadayuki Kanno | 1993-02-23 |
| 5128939 | Method of phase-converting frame and apparatus using same | Yukio Nakano, Tadayuki Kanno, Hiromi Ueda | 1992-07-07 |
| 5042027 | Communication network system and method of controlling a communication network | Akihiko Takase, Yoshiaki Takemura, Naoya Kobayashi, Yasushi Sawada, Yukio Nakano +3 more | 1991-08-20 |