Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8245360 | Rope grip slip-knot device | Michael Tinstman, Daniel Richard Armstrong, William P. Liteplo, John D. Fiegener | 2012-08-21 |
| D617629 | Rope grip slip-knot device | Michael Tinstman, Daniel Richard Armstrong, William P. Liteplo, John D. Fiegener | 2010-06-15 |