Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5765246 | Inflatable mattress with improved border support wall | — | 1998-06-16 |
| 5642546 | Inflatable mattress with improved border support wall | — | 1997-07-01 |
| 5564140 | Frame assembly for supporting a mattress | Thomas D. Embertson | 1996-10-15 |
| 5339692 | Ultrasonic rail web centerline detector | Alex Ivachev | 1994-08-23 |
| 5111624 | Method and apparatus for limiting the dispersion of rail grinding machine spark and dust residue | Bruce E. Kallevig | 1992-05-12 |
| 4779384 | Rail grinder | Darrell E. Johnson, Richard J. Gitter, Bernard C. Lancette, Winfred C. Croft | 1988-10-25 |