Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888097 | Water purification method and apparatus | David J. Shannon, Keith Vacha | 1989-12-19 |
| 4805692 | Condenser for water purification apparatus | Keith Vacha | 1989-02-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888097 | Water purification method and apparatus | David J. Shannon, Keith Vacha | 1989-12-19 |
| 4805692 | Condenser for water purification apparatus | Keith Vacha | 1989-02-21 |