Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7745956 | Grid interconnection device, grid interconnection system and transfer trip system | Kazuo Ito, Wataru Horio, Masahiro Makino, Ryuzo Hagihara, Haruhiko Tatsumi +1 more | 2010-06-29 |
| 7236959 | Method for collectively receiving at high voltage and distributing at low voltage, and collective housing using same | Hirosato Yagi, Ryuzo Hagihara | 2007-06-26 |
| 6737761 | Power load control system | Hirosato Yagi, Ryuzo Hagihara | 2004-05-18 |
| 6717982 | Data communication apparatus | Ryuzo Hagihara, Yasuhiro Yagi | 2004-04-06 |
| 6291764 | Photovoltaic power generation device | Ryuzo Hagihara, Hitoshi Kishi | 2001-09-18 |
| 6252785 | Device for operating inverter and power system | Ryuzo Hagihara, Kenji Uchihashi | 2001-06-26 |
| 6175512 | Device for operating inverter and power system | Ryuzo Hagihara, Kenji Uchihashi | 2001-01-16 |
| 5951785 | Photo-voltaic apparatus | Kenji Uchihashi, Hitoshi Kishi, Ryuzo Hagihara | 1999-09-14 |
| 5886890 | Power-supply system involving system interconnection | Ryuzo Hagiwara, Shinichi Kozuma, Hitoshi Kishi | 1999-03-23 |
| 4839992 | Polishing device | Hiroshi Hagiwara, Ichizo Kakumu | 1989-06-20 |