Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5683148 | Brake pipe pneumatic valve | Wei Li | 1997-11-04 |
| 5639047 | Railroad signal with remote light source | James P. Chew | 1997-06-17 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5683148 | Brake pipe pneumatic valve | Wei Li | 1997-11-04 |
| 5639047 | Railroad signal with remote light source | James P. Chew | 1997-06-17 |