Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11613878 | Adjustable drain assembly | Michael W. Johnson | 2023-03-28 |
| 6588454 | Plumbing system test fitting | Michael W. Johnson, Richard E. Schaupp | 2003-07-08 |
| 6438765 | Toilet sealing ring adapter assembly | Michael W. Johnson | 2002-08-27 |
| 6327717 | Toilet sealing ring adapter assembly | Michael W. Johnson | 2001-12-11 |
| 6192532 | Shower drain replacement device | Michael W. Johnson | 2001-02-27 |
| 5862533 | Toilet sealing ring adapter assembly | Michael W. Johnson | 1999-01-26 |
| 5581886 | Plier-type tubing cutter | Michael W. Johnson | 1996-12-10 |