Issued Patents 2017
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9630807 | Energy saving elevator apparatus with maintaining potential energy by intellectual control variable mass | Zhenkun Wang, Shiyuan Song | 2017-04-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9630807 | Energy saving elevator apparatus with maintaining potential energy by intellectual control variable mass | Zhenkun Wang, Shiyuan Song | 2017-04-25 |