Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6373261 | Two-wire level transmitter | John A. Kielb | 2002-04-16 |
| 5672975 | Two-wire level transmitter | John A. Kielb, Richard L. Nelson | 1997-09-30 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6373261 | Two-wire level transmitter | John A. Kielb | 2002-04-16 |
| 5672975 | Two-wire level transmitter | John A. Kielb, Richard L. Nelson | 1997-09-30 |