Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8028354 | Spa apparatus | David J. Gruenwald, Edwin B. Hatch, David A. Schmitz, John A. Groeschel | 2011-10-04 |
| 7600273 | Spa apparatus | David J. Gruenwald, Edwin B. Hatch, David A. Schmitz, John A. Groeschel | 2009-10-13 |
| D526505 | Spa apparatus | David J. Gruenwald, Edwin B. Hatch, David A. Schmitz, John A. Groeschel | 2006-08-15 |