Adjustable ladder
Description
The broken lines are for the purposes of illustrating portions of the adjustable ladder and form no part of the claimed design.
Claims
The ornamental design for an adjustable ladder, as shown and described.
Referenced Cited
U.S. Patent Documents
4119177 | October 10, 1978 | Andersson |
5738186 | April 14, 1998 | Jones |
8011475 | September 6, 2011 | Wang |
8104580 | January 31, 2012 | Eriksson |
8387753 | March 5, 2013 | Kieffer |
D777351 | January 24, 2017 | Holmberg |
D799063 | October 3, 2017 | Yin |
10161184 | December 25, 2018 | Lampe |
20060283664 | December 21, 2006 | Yao |
20070209875 | September 13, 2007 | Chen |
20090050407 | February 26, 2009 | Eriksson |
Patent History
Patent number: D904641
Type: Grant
Filed: Apr 21, 2018
Date of Patent: Dec 8, 2020
Inventor: Ding He (Shenzhen)
Primary Examiner: Gino Colan
Application Number: 29/644,921
Type: Grant
Filed: Apr 21, 2018
Date of Patent: Dec 8, 2020
Inventor: Ding He (Shenzhen)
Primary Examiner: Gino Colan
Application Number: 29/644,921
Classifications
Current U.S. Class:
Ladder (D25/64)