Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6604249 | Advanced dual-flush valve | Joseph Han, John C. McKay, Farid Maiwandi | 2003-08-12 |
| 6442772 | Advanced dual-flush valve | Joseph Han, John C. McKay, Farid Maiwandi | 2002-09-03 |