Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8348813 | Treadmill having roller structure | — | 2013-01-08 |
| 8282535 | Treadmill roller structure and treadmill | — | 2012-10-09 |
| 7549312 | Concentric machining device for a roller | — | 2009-06-23 |
| 6773323 | Toy element set for constructional toy | — | 2004-08-10 |
| 6565406 | Geometric construction system | — | 2003-05-20 |
| 6558065 | Geometric construction system | — | 2003-05-06 |
| 6464553 | Geometric construction system | — | 2002-10-15 |