Issued Patents 2022
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11486119 | Universal bathtub drain and overflow system and kit | Jian Zhang, Blake Oatey, Matthew J. Siena, Christopher S. Graham | 2022-11-01 |
| 11466442 | Air admittance valve | Kenneth Brown, Kai Zhang | 2022-10-11 |