Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5573253 | Packing rings, method for production of the packing rings, and seal device using the packing rings | Kazumasa Naitou, Takahisa Ueda, Masaru Fujiwara | 1996-11-12 |
| 5522603 | Packing rings, method for production of the packing rings, and seal device using the packing rings | Kazumasa Naitou, Takahisa Ueda, Masaru Fujiwara | 1996-06-04 |