Working ladder
United States Patent D764073

Wang, Wanxing (Ningbo, CN)
Application Number:
Publication Date:
Filing Date:
Ningbo Xingfu Tools Co., Ltd. (Ningbo, CN)
Primary Class:
International Classes:
(IPC1-7): 2504
Field of Search:
D25/62-69, 182/21, 182/67.4, 182/93, 182/33, 182/129, 182/172, 182/165, 182/204, 182/200, 182/194, 182/209, 182/210, 182/180.1, 182/186.8, 182/195, 182/207, 182/159, 182/152, 182/163, 182/156, 182/20, 182/25, 182/102, 182/115, 182/112, 182/120, 182/206, 182/64.1, 182/186.7, 182/189, 182/105, 182/116, 182/124, 182/178.2
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US Patent References:
20140332316Stepladder Having a Ladder Top with Conduit Holder Slot and MethodNovember, 2014Tiber182/129
D706455LadderJune, 2014BuchananD25/64
20120073903STEPLADDERMarch, 2012Krause182/159
D565745Step stoolApril, 2008MeyersD25/65
D562991Step stoolFebruary, 2008MeyersD25/65
D523155Foldable step ladderJune, 2006ShoultzD25/64
20040231920Rigidified step ladderNovember, 2004Meeker182/165
6779632Adjustable leveling stepladderAugust, 2004Parks, III182/200
20030057019STEP SIGNALMarch, 2003Schmitt182/18
5915498Ladder with nesting lateral support bracesJune, 1999Figliuzzi182/165
5181583Ladder-like stilts for ceiling workJanuary, 1993Platt182/112
4276955Multiple-purpose work unitJuly, 1981Hickman182/129

Primary Examiner:
Ramirez, Cynthia
Assistant Examiner:
Colan, Gino
Attorney, Agent or Firm:
Wang Law Firm, Inc.

1. The ornamental design for a working ladder, as shown and described.


FIG. 1 is a left view showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a front perspective view thereof;

FIG. 7 is a rear perspective view of the working ladder with the lower step flipped over the upper step;

FIG. 8 is a front perspective view of the working ladder when folded; and,

FIG. 9 is a front perspective view of the working ladder with the handle frame raised.