Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE32189 | Railway hopper car roof support structure | Marvin Stark | 1986-06-24 |
| 4373841 | Quick release load securing device | Rudolph E. Nadherny | 1983-02-15 |
| 4362111 | Covered hopper car | Marvin Stark | 1982-12-07 |
| 4329106 | Hopper car discharge gate operating mechanism | — | 1982-05-11 |
| 4275662 | Railway hopper car roof support structure | Marvin Starks | 1981-06-30 |
| 4252066 | Levered hopper door lock mechanism | Rudolph E. Nadherny | 1981-02-24 |
| 4184432 | Hopper car door lock mechanism | — | 1980-01-22 |
| 4183370 | Pressure relief valve | — | 1980-01-15 |