Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8028747 | Tube spacer, method of manufacturing the same, and heat exchanger | Hidenori Hata, Kazuhiro Kimura, Noriyuki Kuribayashi, Koji Shimomura | 2011-10-04 |
| 7523721 | Heat exchanger and water heater | Tetsurou Hamada, Hitoshi Hara, Hideaki Yoshitomi, Hiroaki Takashima | 2009-04-28 |
| 7428883 | Heat exchanger and water heater | Tetsurou Hamada, Hitoshi Hara, Hideaki Yoshitomi, Hiroaki Takashima, Mitufuku Asakawa | 2008-09-30 |
| 7223098 | Ignition unit | Hideya Suyama, Atsushi Yoshimoto, Masaaki Kumon, Satoshi Nakai, Kazuya Kawauchi +3 more | 2007-05-29 |
| 6979192 | Burner head and gas burning appliance provided with such a burner head | Minoru Ikuta, Shunji Tanba, Akinobu Nakamura | 2005-12-27 |