Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6200470 | Sub-soil domestic wastewater treatment apparatus having multiple aeration chambers | Joseph L. Miller | 2001-03-13 |
| 5061369 | Sub-soil domestic wastewater treatment apparatus having wedge shaped inclined surfaces | Joseph L. Miller | 1991-10-29 |