Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4653938 | Self-adjusting ball bearing cage | — | 1987-03-31 |
| 4624388 | Liquid tank weld cavitation protection | Yi-Ming Chang | 1986-11-25 |
| 4589526 | Controllable fluid damper for fluid-containing tank | Yi-Ming Chang | 1986-05-20 |
| 4558597 | Surface tension screen failure detection method and apparatus | Yi-Ming Chang | 1985-12-17 |
| 4513906 | Liquid tank weld cavitation protection | Yi-Ming Chang | 1985-04-30 |