Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 8562476 | Manual transmission using chain and planetary gear set as final drive | Roger T. Simpson | 2013-10-22 | $11,814,000 |
| 7048665 | Power transmission chain having links with lateral spacing elements | Tim J. Ledvina, Dennis Bubel, Mark A. Giovannini, Roger P. Butterfield | 2006-05-23 | $8,565,000 |
| 6595882 | Power transmission chain having links with lateral spacing elements | Dennis Bubel, Mark A. Giovannini, Roger P. Butterfield | 2003-07-22 | $12,616,000 |
| 6406394 | Power transmission chain having links with lateral spacing elements | Dennis Bubel, Mark A. Giovannini, Roger P. Butterfield | 2002-06-18 | $5,861,000 |