The dashed-dot-dot-dashed broken lines in the drawings are shown for the purpose of illustrating portions of the ladder that form no part of the claimed design.
The dashed-dot-dot-dashed broken lines in the drawings are shown for the purpose of illustrating portions of the ladder that form no part of the claimed design.
| Number | Name | Date | Kind |
|---|---|---|---|
| 1935349 | Breslow | Nov 1933 | A |
| 4027741 | Derrick | Jun 1977 | A |
| 6364057 | Cornejo | Apr 2002 | B1 |
| 6779632 | Parks, III | Aug 2004 | B1 |
| D548364 | Skubic | Aug 2007 | S |
| D554771 | Skubic | Nov 2007 | S |
| 20070193828 | Astor | Aug 2007 | A1 |
| 20070193829 | Astor | Aug 2007 | A1 |
| 20100116592 | Clements | May 2010 | A1 |
| 20140332316 | Tiber | Nov 2014 | A1 |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 29501490 | Sep 2014 | US |
| Child | 29591520 | US |