Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8286754 | Vertical lift platform assembly | — | 2012-10-16 |
| 8122552 | Counterbalance mechanism for fold out ramp | Donald Morris | 2012-02-28 |
| 8020234 | Counterbalance mechanism for fold out ramp | David Johnson | 2011-09-20 |
| 7913343 | Counterbalance mechanism for fold out ramp | — | 2011-03-29 |
| 7913341 | Counterbalance mechanism for fold out ramp | Donald Morris | 2011-03-29 |
| 7913342 | Counterbalance mechanism for fold out ramp | Donald Morris | 2011-03-29 |
| 7896134 | Low-rise vertical platform lift assembly with low-profile lifting mechanism | Donald Morris, Roger Young | 2011-03-01 |
| 7326024 | Wheelchair lift assembly having a compact stowed profile | David Johnson, Edward Wagner, Donald Morris | 2008-02-05 |
| 6843635 | Vehicle fold-out ramp | — | 2005-01-18 |
| 6602041 | Vehicle flip-out ramp | Cleatus A. Lewis, Donald Morris | 2003-08-05 |
| 6409458 | Low floor vehicle ramp assembly | Cleatus A. Lewis, Curtis J. Simon | 2002-06-25 |
| 6238168 | Ramp assembly with locking mechanisms | Cleatus A. Lewis, Curtis J. Simon | 2001-05-29 |
| 6210098 | Low floor vehicle ramp assembly | Cleatus A. Lewis, Curtis J. Simon | 2001-04-03 |
| 6203265 | Ramp assembly with lifting levers | Cleatus A. Lewis, Curtis J. Simon | 2001-03-20 |
| 6186733 | Low floor vehicle ramp assembly | Cleatus A. Lewis | 2001-02-13 |
| 6095747 | Wheelchair lift with improved outer, inner, and side barriers | — | 2000-08-01 |
| 6039528 | Wheelchair lift with improved outer, inner, and side barriers | — | 2000-03-21 |
| 6010298 | Low floor vehicle ramp assembly | Cleatus A. Lewis, Curtis J. Simon | 2000-01-04 |
| 5865593 | Wheelchair lift with wheelchair barrier platform interlock mechanism | — | 1999-02-02 |
| 5803615 | Split bearing | — | 1998-09-08 |
| 5678932 | Split bearing | — | 1997-10-21 |
| 4282757 | Device for detecting rate of change in pressure | — | 1981-08-11 |
| 4261387 | Pipeline surge relief system | — | 1981-04-14 |