Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12370983 | Apparatus and method for lowering and raising a trailer | Andrew L. Wallner, Tianyu Ling, Jeffrey S. Kemppainen | 2025-07-29 |
| 12090971 | Apparatus and method for lowering and raising a trailer | Andrew L. Wallner, David Sun, Tianyu Ling, Patrick Salois, Brian M. Collins | 2024-09-17 |
| 11787372 | Apparatus and method for lowering and raising a trailer | Andrew L. Wallner, David Sun, Tianyu Ling, Patrick Salois, Brian M. Collins | 2023-10-17 |
| 11148645 | Apparatus and method for lowering and raising a trailer | Andrew L. Wallner, David Sun, Tianyu Ling, Patrick Salois, Brian M. Collins | 2021-10-19 |
| 9637189 | Axle lift assembly | Jonathon Karel, Gary Greer | 2017-05-02 |
| 9555844 | Slider suspension assembly with compliant hold-down arrangement | — | 2017-01-31 |
| 9428233 | Axle lift assembly | Jonathon Karel, Gary Greer | 2016-08-30 |
| 9403499 | Energy absorbent slider stop and rear underride protection system | — | 2016-08-02 |
| 8870198 | Axle lift assembly | Jonathon Karel, Gary Greer | 2014-10-28 |
| 8695998 | Axle lift assembly | Jonathon Karel, Gary Greer | 2014-04-15 |
| 7416204 | Lightweight narrow-span fifth wheel | Roger L. Elkins, Steven C. Dupay, Mark M. Audo, Samuel A. Martin | 2008-08-26 |
| 6916038 | Vehicle suspension system | Thomas A. McKenzie | 2005-07-12 |
| 6431532 | Variable geometry dampening and trailing arm suspension including same | Thomas A. McKenzie | 2002-08-13 |
| 6116626 | Independent front suspension | Herbert J. Cherry | 2000-09-12 |
| 6028258 | Drum bracket | Marion J. Saalman | 2000-02-22 |
| 6012378 | Air brake actuator having increased output | — | 2000-01-11 |
| 6006651 | Spring brake actuator with filtered service vent opening | William C. Pierce, Steven M. Stojic | 1999-12-28 |
| 6003433 | Tamper-resistant brake actuator | William C. Pierce | 1999-12-21 |
| 5957032 | Air-operated brake actuator mounting | — | 1999-09-28 |
| 5921532 | Air spring with internal support member | William C. Pierce, John Michael Douglass, Gregory Galazin, Daniel Greenzweig, Gregory A. Richardson | 1999-07-13 |
| 5722311 | Fluid-operated brake actuator with spring chamber isolation | William C. Pierce, Steven M. Stojic | 1998-03-03 |
| 5713238 | Spring brake actuator with spring force measurement | William C. Pierce | 1998-02-03 |
| 5353688 | Tamper-resistant brake actuator | William C. Pierce | 1994-10-11 |
| 5058916 | Apparatus for providing additional lift in a retractable suspension | — | 1991-10-22 |