Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872374 | Planetary transmission apparatus having a four element torque converter | Edward G. Trachman, Shan Shih | 1989-10-10 |
| 4872375 | Control method for planetary transmission having four element torque converter | Edward G. Trachman, Shan Shih | 1989-10-10 |