Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10309698 | Oil return management in a HVAC system | Limin Zhang, Wenyong CHEN | 2019-06-04 |
| 9638445 | Oil return management in a HVAC system | Limin Zhang, Wenyong CHEN | 2017-05-02 |