Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5674401 | Oil monitor with magnetic field | James F. Kirkpatrick, Eric Johnson, Keith A. Hawn | 1997-10-07 |
| 5614830 | Oil monitor with magnetic field | James F. Kirkpatrick, Eric Johnson, Keith A. Hawn | 1997-03-25 |