Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4825083 | Ultraviolet water treatment apparatus | John A. Johnson | 1989-04-25 |
| 4757205 | Ultraviolet water treatment apparatus | John A. Johnson | 1988-07-12 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4825083 | Ultraviolet water treatment apparatus | John A. Johnson | 1989-04-25 |
| 4757205 | Ultraviolet water treatment apparatus | John A. Johnson | 1988-07-12 |