Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887962 | Partial combustion burner with spiral-flow cooled face | Hendricus J. A. Hasenack | 1989-12-19 |
| 4865542 | Partial combustion burner with spiral-flow cooled face | Hendricus J. A. Hasenack | 1989-09-12 |