Patents per Year
Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 11981590 | Multiple chamber septic tank with a plurality of large and small access ports | John R. Smith, Ron Keffer, Andrew C. Middleton, Robin L. Weightman, Peter Goodale +1 more | 2024-05-14 | |
| 8673152 | Methods for polishing wastewater utilizing a bed of commingled bauxite residue and iron filings | John R. Smith, Jaw K. Fu, Rajat Ghosh, Kevin Kitzman, Jonell Kerkhoff +4 more | 2014-03-18 | $37,470,000 |
| 8206586 | Systems for polishing wastewater utilizing natural media filtration | John R. Smith, Jaw K. Fu, Rajat Ghosh, Kevin Kitzman, Jonell Kerkhoff +4 more | 2012-06-26 | $17,652,000 |