Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5775073 | Rake compactor and helical paddle wheel for aquatic harvester | by Margaret L. Kelpin, administratrix | 1998-07-07 |
| 4507909 | Compactor and paddle wheel for aquatic harvester | — | 1985-04-02 |
| 4322208 | Swivel mounted propulsion and steering apparatus | — | 1982-03-30 |