Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE35703 | Combination coating thickness gauge using a magnetic flux density sensor and an eddy current search coil | Frank Koch, David Beamish | 1997-12-30 |
| 5686831 | Gauge with reversible display screen | — | 1997-11-11 |
| 5623427 | Nondestructive anodic capacity gauge | Frank Koch | 1997-04-22 |