Issued Patents 2023
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11851864 | Gravity-fed toilet with quiet siphonic flush | William Kalk | 2023-12-26 |
| 11832042 | Speaker and shower | Kenneth Scott Hanna, Michael James Soetaert, Keith Scott Ruh, Gregory de Swarte | 2023-11-28 |
| 11753808 | Air drive system for a toilet | Clayton C. Garrels, Jeremiah J. Rauwerdink | 2023-09-12 |
| 11739517 | Fluidics devices for plumbing fixtures | Clayton C. Garrels, William Kalk, Randal S. Graskamp | 2023-08-29 |
| 11674298 | Clean toilet and accessories | Michael Luettgen, Clayton C. Garrels, Peter W. Denzin | 2023-06-13 |
| 11560703 | Gravity-fed toilet with quiet siphonic flush | William Kalk | 2023-01-24 |
| 11542698 | Clean toilet and accessories | Michael Luettgen, Clayton C. Garrels, Peter W. Denzin | 2023-01-03 |