Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8955641 | Passive valve and resonator assembly for vehicle exhaust system | Kwin Abram, Kamilla Iskenderova, James Egan, Dennis Shaw | 2015-02-17 |
| 8453672 | Passive valve for attenuation of low frequency noise | Kwin Abram, Joseph Callahan, Robin Willats | 2013-06-04 |
| 8365522 | Dual exhaust system with independent valve control | Kwin Abram, Joseph Callahan, James Egan, Robin Willats | 2013-02-05 |
| 7650965 | Exhaust system | Aaron M. Thayer, Benjamin E. Jackson | 2010-01-26 |
| 7628250 | Passive valve assembly for vehicle exhaust system | Kwin Abram, Joseph Callahan | 2009-12-08 |
| 7584938 | Side loaded valve assembly | Joseph Callahan, Kwin Abram, Robin Willats | 2009-09-08 |
| 7575096 | Pressed assembly for passive valve installation | Robin Willats, Joseph Callahan, Anthony Morales | 2009-08-18 |
| 7155333 | Method and apparatus for controlling sound of an engine by sound frequency analysis | Kwin Abram, Joe Callahan, Robin Willats | 2006-12-26 |