Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7013743 | Zero speed indicating devices and processes for testing same | Ralph L. Barnett | 2006-03-21 |
| 6928855 | Zero speed indicating devices and processes for testing same | Ralph L. Barnett | 2005-08-16 |
| 6877355 | Zero speed indicating devices and processes for testing same | Ralph L. Barnett | 2005-04-12 |
| 6604014 | Remote and proximal guard testing systems and testing systems either separately or in conjunction with interlock testing mechanisms and systems | Ralph L. Barnett | 2003-08-05 |