Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D484568 | Filter cartridge | Michael J. Williams | 2003-12-30 |
| D479300 | Filter cartridge | Michael J. Williams | 2003-09-02 |
| 6506302 | Key system for ecological filter cartridge and element | — | 2003-01-14 |