Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4690697 | Long residence pollution control system | Arthur G. Schwartz, Richard M. Gurries | 1987-09-01 |
| 4679268 | Method and apparatus for burning solid waste products using a plurality of multiple hearth furnaces | Richard M. Gurries, Eric A. Nering | 1987-07-14 |