Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5259985 | Calcium carbonate scale inhibitor having organophosphonate, water soluble acrylic or maleic copolymer and citric acid | Keisho Nakanishi, Sakae Katayama | 1993-11-09 |
| 4814406 | Scale inhibitor | Sakae Katayama, Tadahiko Asano, Keisyo Nakanishi | 1989-03-21 |