Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D551152 | Leveler cap | Mato Colak | 2007-09-18 |
| D520438 | Wheel positional restraint device | John I. Colak | 2006-05-09 |
| D503139 | Wheel positional restraint device | John I. Colak | 2005-03-22 |
| 6752381 | Wheel positional restraint device and method for using the same | John I. Colak | 2004-06-22 |