Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12409887 | Suspension assembly with slider arrangement | Edward Hammer, Jeffrey M. Galla | 2025-09-09 |
| 11970210 | Suspension assembly with slider arrangement | Edward Hammer, Jeffrey M. Galla | 2024-04-30 |
| 10894457 | Holding mount | Edward Hammer | 2021-01-19 |
| 10486482 | Axle unit | Roger L. Jansen, III | 2019-11-26 |
| 10293651 | Suspension link element | Roger L. Jansen, III | 2019-05-21 |
| 10293652 | Axle unit | — | 2019-05-21 |
| 10239374 | Axle unit | Roger L. Jansen, III | 2019-03-26 |
| 10086667 | Axle tie rod | — | 2018-10-02 |
| 10029527 | Trailing arm suspension assembly | Edward Hammer, William Broene, Greg Thorwall, Roger L. Jansen, III | 2018-07-24 |
| 9630466 | Link unit | — | 2017-04-25 |
| 7210692 | Trailing beam suspension with alignment adjustment | — | 2007-05-01 |
| 6805369 | Spring beam suspension with compressed axle mounting | — | 2004-10-19 |
| 6679509 | Trailing arm suspension with anti-creep automatic reset | Perry W. Thomas | 2004-01-20 |
| 6257597 | Anti-creep device for a trailer with air springs | — | 2001-07-10 |
| 5921532 | Air spring with internal support member | William C. Pierce, John Michael Douglass, Daniel Greenzweig, William J. Hicks, Gregory A. Richardson | 1999-07-13 |
| 5682922 | Dual in-line height control valve assembly | William C. Pierce | 1997-11-04 |
| 5393096 | Suspension frame bracket | William C. Pierce | 1995-02-28 |
| 5375819 | Dual in-line height control valve assembly | William C. Pierce | 1994-12-27 |
| 5333645 | Height control valve and dump valve therefor | — | 1994-08-02 |
| 5112078 | Axle mounting assembly | William C. Pierce | 1992-05-12 |
| 5088763 | Apparatus for mounting a trailing arm air suspension to a sliding frame | William C. Pierce | 1992-02-18 |