Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6239082 | Petroleum quench oil | William Donald Hewson | 2001-05-29 |
| 5958849 | High performance metal working oil | William Donald Hewson | 1999-09-28 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6239082 | Petroleum quench oil | William Donald Hewson | 2001-05-29 |
| 5958849 | High performance metal working oil | William Donald Hewson | 1999-09-28 |