Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7726658 | Driven seal assembly for rotary drive shaft of motor | Michael E. Grunwald | 2010-06-01 |
| 6805299 | Fountain aerator with flow straightener | Brian J. Hanke | 2004-10-19 |
| 6179228 | Water fountain spray modifier | Dennis L. Ramaker | 2001-01-30 |
| 5011372 | Aeration apparatus for pond | Nicholas B. Nigrelli | 1991-04-30 |
| 4981622 | Aeration apparatus and method | Nicholas B. Nigrelli | 1991-01-01 |