Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7347655 | Hole plug | Norimasa Nagasawa | 2008-03-25 |
| 6854454 | Oil separating mechanism and oil separating unit | Tomohide Okuta, Nobuhiro Takamatsu, Fusatoshi Tanaka, Megumu Fukushima, Katsunori Kuremiya +1 more | 2005-02-15 |
| D490767 | Hole plug | Norimasa Nagasawa | 2004-06-01 |
| D318792 | Retainer for rubbery articles or the like | Hiroyuki Hamanaka | 1991-08-06 |