Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4517925 | High efficiency refuse-derived-fuel supplying system for industrial boilers | Harold B. Mackenzie | 1985-05-21 |
| 4358237 | Recovered solid waste storage building and method | Harold B. Mackenzie | 1982-11-09 |