Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4937557 | Monitoring and indicating circuit for reverse osmosis filter | George K. Sutherland | 1990-06-26 |
| 4847598 | Water treatment regeneration system incorporating alternating current excitation and paired operational amplifiers with asymmetrical feedback elements | George K. Sutherland | 1989-07-11 |
| 4320010 | Regeneration detector for water softeners | George K. Sutherland | 1982-03-16 |