Showing 1–5 of 5 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Sumantri Cahyono | Pt Prima Alloy Steel Universal | 11 |
| 2 | A. Kushartanto | Pt Prima Alloy Steel Universal | 3 |
| 3 | Heru Wijaya | — | 1 |
| 3 | Alim Prakasa | Pt Maspion | 1 |
| 3 | A. Kus Hartanto | Pt Prima Alloy Steel Universal | 1 |