Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5525116 | Stepless automatic variable transmission | Jong O. Ra, Wan M. Yoo | 1996-06-11 |
| 5484344 | Stepless automatic variable transmission | Jong O. Ra, Wan M. Yoo | 1996-01-16 |
| 5484349 | Stepless automatic variable transmission | Jong O. Ra, Wan M. Yoo | 1996-01-16 |
| 5466196 | Stepless automatic variable transmission | Jong O. Ra, Wan M. Yoo | 1995-11-14 |
| 5415597 | Stepless automatic variable transmission | Jong O. Ra, Wan M. Yoo | 1995-05-16 |
| 5364320 | Continuously-geared automatic transmission with controlling brakes | Jong O. Ra, Wan M. Yoo | 1994-11-15 |
| 5330395 | Continuously-geared automatic transmission with controlling brakes | Jong O. Ra, Wan M. Yoo | 1994-07-19 |
| 5326334 | Continuously engaged geared automatic transmission with controlling brakes | Jong O. Ra | 1994-07-05 |
| 5322488 | Continuously geared automatic transmission with controlling brakes | Jong O. Ra, Wan M. Yoo | 1994-06-21 |
| 5106353 | Variable transmission | Jong O. Ra | 1992-04-21 |
| 5062823 | Continuously variable transmission with controlling brakes | Jong O. Ra | 1991-11-05 |