Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10150138 | Interface for inserting bonding material between the joins of two interlocking members | Carol Ann Haag | 2018-12-11 |
| 6391192 | Apparatus for treating biological sludge | — | 2002-05-21 |
| 5286384 | Sludge scraper apparatus | — | 1994-02-15 |
| D341670 | Precast sludge tank roof panel with removable grate | — | 1993-11-23 |
| 5250199 | Sludge scraper apparatus | — | 1993-10-05 |