Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5183573 | Multipurpose scale preventer/remover | Robert P. Kreh | 1993-02-02 |
| 5022926 | Corrosion control | Robert P. Kreh, Joseph T. Lundquist, John A. Kelly, Vincent Kuhn | 1991-06-11 |
| 4935205 | Corrosion inhibition | Robert P. Kreh, Joseph T. Lundquist | 1990-06-19 |