Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12071805 | Hydraulic door closer capable of reducing oil-pressure therein in high temperature | — | 2024-08-27 |
| 11091947 | Hydraulic door closer capable of reducing oil-pressure therein in high temperature | — | 2021-08-17 |
| 11091948 | Hydraulic door closer capable of reducing oil-pressure therein in high temperature | — | 2021-08-17 |
| 10633902 | Hydraulic door closer capable of reducing oil-pressure therein in high temperature | — | 2020-04-28 |
| 9151100 | Bracket door closer | — | 2015-10-06 |
| 9009917 | Bracket door closer | — | 2015-04-21 |