Issued Patents All Time
Showing 26–50 of 57 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8578536 | Counterbalance for a fold out ramp | — | 2013-11-12 |
| 8533884 | Fold out ramp | David Johnson | 2013-09-17 |
| 8505141 | Compact folding slide-out ramp assembly | Paul Reichmuth, David Johnson | 2013-08-13 |
| 8438683 | Sliding fold out ramp | David Johnson | 2013-05-14 |
| 8434181 | Ramp assembly installation method | David Johnson | 2013-05-07 |
| 8402660 | Ramp assembly installation method | David Johnson | 2013-03-26 |
| 8375496 | Fold out ramp | David Johnson | 2013-02-19 |
| 8327485 | Counterbalance for a fold out ramp | David Johnson | 2012-12-11 |
| 8250693 | Fold out ramp | David Johnson | 2012-08-28 |
| 8234737 | Latch for a fold out ramp | David Johnson | 2012-08-07 |
| 8230539 | Fold out ramp | David Johnson | 2012-07-31 |
| 8181300 | Fold out ramp | David Johnson | 2012-05-22 |
| 8166594 | Counterbalance mechanism for fold out ramp | — | 2012-05-01 |
| 8132281 | Fold out ramp | David Johnson | 2012-03-13 |
| 8122553 | Fold out ramp | David Johnson | 2012-02-28 |
| 8122552 | Counterbalance mechanism for fold out ramp | Alan Cohn | 2012-02-28 |
| 8032963 | Fold out ramp | David Johnson | 2011-10-11 |
| 7913341 | Counterbalance mechanism for fold out ramp | Alan Cohn | 2011-03-29 |
| 7913342 | Counterbalance mechanism for fold out ramp | Alan Cohn | 2011-03-29 |
| 7896134 | Low-rise vertical platform lift assembly with low-profile lifting mechanism | Alan Cohn, Roger Young | 2011-03-01 |
| 7870631 | Fold out ramp | David Johnson | 2011-01-18 |
| 7681272 | Counterbalance assembly for a fold out ramp | David Johnson | 2010-03-23 |
| 7533432 | Counterbalance assembly for a fold out ramp | David Johnson | 2009-05-19 |
| 7533433 | Counterbalance assembly for a fold out ramp | David Johnson | 2009-05-19 |
| 7533434 | Counterbalance assembly for a fold out ramp | David Johnson | 2009-05-19 |