Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7487677 | Apparatus and methods for monitoring water consumption and filter usage | John Y. Chai, Sunny Chai | 2009-02-10 |
| 7107838 | Apparatus and methods for monitoring water consumption and filter usage | John Y. Chai, Sunny Chai | 2006-09-19 |