Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4919722 | Method of manufacturing a granular building material from refuse | Roger J. Clenin | 1990-04-24 |
| 4898615 | Method of manufacturing cement | Roger J. Clenin | 1990-02-06 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4919722 | Method of manufacturing a granular building material from refuse | Roger J. Clenin | 1990-04-24 |
| 4898615 | Method of manufacturing cement | Roger J. Clenin | 1990-02-06 |