Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824055 | Railroad FROG | Allen J. Tuningley, Keith M. Barlow | 1989-04-25 |
| 4809403 | Collapsible presizing rings | — | 1989-03-07 |
| 4796332 | Constricting and fastening apparatus | — | 1989-01-10 |