Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6705800 | Liquid drainage system with cover | Carl D. Ring, Douglas Miles Dygert | 2004-03-16 |
| 6497031 | Apparatus for manufacturing drainage line units and associated methods | Michael Houck | 2002-12-24 |
| 6482319 | In-line filtration system for treatment of septic tank effluent | Michael Houck | 2002-11-19 |
| 6443652 | Aggregate chamber leach lines for leaching effluent and associated method | Michael Houck | 2002-09-03 |
| 6440304 | In-line filtration system for treatment of septic tank effluent | Michael Houck | 2002-08-27 |
| 6383372 | Sequential flow filtration chamber for treatment of waste water and associated method | Michael Houck | 2002-05-07 |
| 6267882 | System for filtration of septic tank sewage effluent | Michael Houck | 2001-07-31 |
| 6173483 | Apparatus for manufacturing drainage line units and associated methods | Michael Houck | 2001-01-16 |