Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12385241 | Drain system for bathtub | David H. Ritter, Brian S. Core, Douglas J. Brouwer, Keith Scott Ruh | 2025-08-12 |
| 11725373 | Drain system for bathtub | David H. Ritter, Brian S. Core, Douglas J. Brouwer, Keith Scott Ruh | 2023-08-15 |