Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4700794 | Vehicle steering apparatus | James R. Bernhagen, Elmer R. Crabb, Marilyn S. Murphy, Daniel G. Roley, Gene R. St. Germain | 1987-10-20 |
| 4376474 | Automatic brake speed bleed system | Hugh V. Piper | 1983-03-15 |