Issued Patents 2005
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6887122 | Yo-yo having visual indication of response setting | Hans W. Van Dan Elzen | 2005-05-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6887122 | Yo-yo having visual indication of response setting | Hans W. Van Dan Elzen | 2005-05-03 |