Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6996130 | Distributed control system and filtering method used in the distributed control system | Masahiro Ohashi, Takeiki Aizono, Dai Fujii, Hiroyuki Tanaka | 2006-02-07 |
| 6957109 | Distributed control system and filtering method used in the distributed control system | Masahiro Ohashi, Takeiki Aizono, Dai Fujii, Hiroyuki Tanaka | 2005-10-18 |
| 6708069 | Distributed control system and filtering method used in the distributed control system | Masahiro Ohashi, Takeiki Aizono, Dai Fujii, Hiroyuki Tanaka | 2004-03-16 |
| 6681139 | Distributed control system and filtering method used in the distributed control system | Masahiro Ohashi, Takeiki Aizono, Dai Fujii, Hiroyuki Tanaka | 2004-01-20 |
| 6172615 | Communicator for field instruments and method of supplying power to this communicator | — | 2001-01-09 |
| 6023399 | Decentralized control system and shutdown control apparatus | — | 2000-02-08 |
| 5995021 | Communicator for field instruments and method for supplying power to this communicator | — | 1999-11-30 |
| 5835534 | Intrinsically safe barrier and field bus system | — | 1998-11-10 |
| 5757265 | Multiple-cable field bus system | Koji Tomaoki, Toshimitsu Tsuchihashi | 1998-05-26 |
| 5717385 | Field bus system and virtual field apparatus | — | 1998-02-10 |
| 5663985 | Communication apparatus and method in a field bus system | — | 1997-09-02 |
| 5469156 | Field sensor communication system | — | 1995-11-21 |
| 5412643 | Duplex field bus system | — | 1995-05-02 |
| 5184121 | Field sensor communication method and system | Akira Sase, Masao Fukunaga | 1993-02-02 |