Issued Patents All Time
Showing 1–25 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7389891 | Septic system tank | — | 2008-06-24 |
| 7086652 | Molded seal | — | 2006-08-08 |
| 6986227 | Stackable riser configuration | — | 2006-01-17 |
| 6877281 | Stackable riser configuration | — | 2005-04-12 |
| 6817631 | Septic system box pipe seal | — | 2004-11-16 |
| 6789776 | Cast-in anchor attachment apparatus | — | 2004-09-14 |
| 6691975 | Concrete tank seal cast | — | 2004-02-17 |
| 6688072 | Cover for riser section and method of using cover for anchoring riser section in concrete | — | 2004-02-10 |
| 6666349 | Septic system tank | — | 2003-12-23 |
| 6655093 | Riser section and cover therefor | — | 2003-12-02 |
| 6609718 | Seal for casting in a concrete wall of a fluid distribution system container | — | 2003-08-26 |
| 6484451 | Stackable riser resistant to soil movement | — | 2002-11-26 |
| 6460860 | Pipe seal for cast concrete | — | 2002-10-08 |
| 6450505 | Seal for casting in a concrete wall of a fluid distribution system container | — | 2002-09-17 |
| 6385938 | Space for concrete reinforcement rods | — | 2002-05-14 |
| 6015488 | Filter system for septic tank | — | 2000-01-18 |
| 5927898 | Method for installing a septic tank in soil | — | 1999-07-27 |
| 5882014 | Removable section pipe seal for septic systems | — | 1999-03-16 |
| 5871640 | Filter and housing | — | 1999-02-16 |
| D405166 | Removable section pipe seal | — | 1999-02-02 |
| D402349 | Septic system filter | — | 1998-12-08 |
| 5772361 | Extendable anchor base septic tank | — | 1998-06-30 |
| 5711451 | Concrete tank support system | — | 1998-01-27 |
| 5680989 | Adjustable weir for liquid distribution systems | Richard F. Plachy | 1997-10-28 |
| 5666768 | Collapsible handle assembly for concrete covers | — | 1997-09-16 |