Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880513 | Method and apparatus for generating acid and base regenerants and the use thereof to regenerate ion-exchange resins | Thomas A. Davis | 1989-11-14 |
| 4858075 | RF shielded and electrically insulated circuit board structure and method of making same | — | 1989-08-15 |