Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4939811 | Floor polisher with a dust collecting device | Akira Matunaga, Hideo Inoue, Tetu Arai | 1990-07-10 |
| 4910824 | Floor polisher | Eiji Nagayama, Tetuichi Turumi, Yuuichi Terada, Tetu Arai, Takashi Ohta | 1990-03-27 |