Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4637578 | Railroad frog having movable wing rails | — | 1987-01-20 |
| 4624428 | Spring rail frog | — | 1986-11-25 |
| 4428552 | Railroad switch machine | Bing S. Yee | 1984-01-31 |
| 4409902 | Spike drivers | — | 1983-10-18 |
| 4362282 | Railroad frogs | — | 1982-12-07 |
| 4346751 | Foundry molds | — | 1982-08-31 |
| 4346785 | Rail lubricator | — | 1982-08-31 |
| 4251042 | Railway double tongue switch | — | 1981-02-17 |
| 4245719 | Railroad lubricators | — | 1981-01-20 |