Issued Patents All Time
Showing 1–25 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11168777 | Offset idler hub for backlash control | David J. Moenssen | 2021-11-09 |
| 10662838 | Exhaust system spring with torsional damping | — | 2020-05-26 |
| 10047650 | Vehicle exhaust system with resistive patch | — | 2018-08-14 |
| 9970340 | Vehicle exhaust system with resonance damping | Joseph Callahan, Tommy Pham | 2018-05-15 |
| 9863559 | Thin wall welding | Thomas Wahl | 2018-01-09 |
| 9816414 | Adaptive valve spring retainer with vibration damping | — | 2017-11-14 |
| 9624837 | Adaptive valve spring retainer | — | 2017-04-18 |
| 9376947 | Hybrid valve for attenuation of low frequency noise | Joseph Callahan, Robin Willats | 2016-06-28 |
| 9121315 | Passive valve with stop pad | Govindaraj Kalyanasamy, Robin Willats | 2015-09-01 |
| 8955641 | Passive valve and resonator assembly for vehicle exhaust system | Ivan Arbuckle, Kamilla Iskenderova, James Egan, Dennis Shaw | 2015-02-17 |
| 8881863 | Exhaust gas carrying component of an exhaust gas system | Dennis Boennen | 2014-11-11 |
| 8857561 | Exhaust valve combined with active noise control system | James Egan | 2014-10-14 |
| 8776508 | Passive valve assembly with negative start angle | Robin Willats | 2014-07-15 |
| 8683789 | Exhaust valve assembly with intermediate position | Robin Willats, Joseph Callahan | 2014-04-01 |
| 8672090 | Exhaust component with vibration isolated pipe | — | 2014-03-18 |
| 8453672 | Passive valve for attenuation of low frequency noise | Joseph Callahan, Robin Willats, Ivan Arbuckle | 2013-06-04 |
| 8439156 | Muffler with controlled pressure release | — | 2013-05-14 |
| 8365522 | Dual exhaust system with independent valve control | Ivan Arbuckle, Joseph Callahan, James Egan, Robin Willats | 2013-02-05 |
| 8201401 | Passive valve assembly with negative start angle | Robin Willats | 2012-06-19 |
| 8191581 | Wire tube structure for exhaust component | Joseph Callahan | 2012-06-05 |
| 7748404 | Multi-purpose exhaust valve spring | Govindaraj Kalyanasamy | 2010-07-06 |
| 7628250 | Passive valve assembly for vehicle exhaust system | Ivan Arbuckle, Joseph Callahan | 2009-12-08 |
| 7584938 | Side loaded valve assembly | Joseph Callahan, Ivan Arbuckle, Robin Willats | 2009-09-08 |
| 7581710 | Thermally isolated actuator with temporary contacting linkage for an exhaust valve | Joseph Callahan, Robin Willats, David Lee McCrary | 2009-09-01 |
| 7536990 | Hybrid exhaust valve assembly | Robin Willats, Joseph Callahan | 2009-05-26 |