Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11266871 | Stair exerciser apparatus | Robert C Burck, Alexander E Hanson, Noel R. Johnson, Mark J. Kannel | 2022-03-08 |
| 10596409 | Stair exerciser apparatus | Robert C Burck, Alexander E Hanson, Noel R. Johnson, Mark J. Kannel | 2020-03-24 |