Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6814872 | Controller and method for controlling regeneration of a water softener | — | 2004-11-09 |
| 6808639 | Method and apparatus for reducing the amount of hydrogen sulfide in effluent of a water heater | Richard Leland Butsch | 2004-10-26 |