Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4930427 | Railroad gondola or hopper car, particularly a coal car | John Alan Ritter, Jan Z. Tomaka | 1990-06-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4930427 | Railroad gondola or hopper car, particularly a coal car | John Alan Ritter, Jan Z. Tomaka | 1990-06-05 |