Extension ladder

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Description

FIG. 1 is a perspective view of a first embodiment of an extension ladder showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof,

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an enlarged view of portion 9 shown in FIG. 1;

FIG. 10 is an enlarged view of portion 10 shown in FIG. 2;

FIG. 11 is an enlarged view of portion 11 shown in FIG. 2;

FIG. 12 is a perspective view of a second embodiment of the extension ladder;

FIG. 13 is another perspective view thereof;

FIG. 14 is a front elevational view thereof;

FIG. 15 is a rear elevational view thereof;

FIG. 16 is a left side elevational view thereof;

FIG. 17 is a right side elevational view thereof;

FIG. 18 is a top plan view thereof;

FIG. 19 is a bottom plan view thereof;

FIG. 20 is an enlarged view of portion 20 shown in FIG. 12;

FIG. 21 is an enlarged view of portion 21 shown in FIG. 13; and,

FIG. 22 is an enlarged view of portion 22 shown in FIG. 13.

The dash-dash broken lines in the drawings depict portions of the extension ladder that form no part of the claimed design. The dot-dash broken lines in FIGS. 1-2, 9-13, and 20-22 represent boundaries of the enlarged portions and form no part of the claimed design.

Claims

The ornamental design for an extension ladder as shown and described.

Referenced Cited
U.S. Patent Documents
D610709 February 23, 2010 Lamb
D799063 October 3, 2017 Yin
D838385 January 15, 2019 Moss
D966556 October 11, 2022 Barker
D966557 October 11, 2022 Maxfield
D999404 September 19, 2023 Maxfield
D1026251 May 7, 2024 Hu
D1056249 December 31, 2024 Li
20230374858 November 23, 2023 Moss
20230383601 November 30, 2023 Maxfield
Patent History
Patent number: D1072281
Type: Grant
Filed: Jan 14, 2025
Date of Patent: Apr 22, 2025
Inventor: Qiulan Hu (Zhejiang)
Primary Examiner: Gino Colan
Application Number: 29/984,278
Classifications
Current U.S. Class: Ladder (D25/64)