Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872083 | Method and circuit for balance control of positive and negative ions from electrical A.C. air ionizers | — | 1989-10-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872083 | Method and circuit for balance control of positive and negative ions from electrical A.C. air ionizers | — | 1989-10-03 |