Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7484542 | Tire tread with sipes having tie bars | Karl Eric Sundkvist, Tooney Raymond Jones, David Allen Griffin, John Russell Shaffer, Charles Kenneth Schmalix +1 more | 2009-02-03 |
| D535611 | Tire tread | Karl Eric Sundkvist, Michael Joseph Weber, Kevin Lee Burnworth, Robert Allen Losey | 2007-01-23 |
| D531572 | Tire tread | Charles Kenneth Schmalix, David Allen Griffin, Keith Eric Grabo, Karl Eric Sundkvist | 2006-11-07 |
| D338179 | Tire tread and buttress | Frederick W. Miller, Jay Kevin Lawrence | 1993-08-10 |