Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6773471 | Low sulfur coal additive for improved furnace operation | Stephen Allen Johnson, John Wurster | 2004-08-10 |
| 6729248 | Low sulfur coal additive for improved furnace operation | Stephen Allen Johnson, John Wurster | 2004-05-04 |