Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886001 | Method and apparatus for plasma pyrolysis of liquid waste | Robert C. Chang, Steven C. Vorndran | 1989-12-12 |
| 4870911 | Apparatus for waste disposal and method | Robert C. Chang, Steven C. Vorndran | 1989-10-03 |