Issued Patents 1997
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D384136 | Water closet | Seijiro Kawamura, Hisayasu Sakai | 1997-09-23 |
| D379496 | Water closet | Seijiro Kawamura, Hisayasu Sakai | 1997-05-27 |
| D377206 | Urinal | — | 1997-01-07 |
| D377207 | Urinal | Hisayoshi Sakai | 1997-01-07 |
| D377209 | Water closet tank | Hisayoshi Sakai, Seijiro Kawamura | 1997-01-07 |