IP Library › Granted Patent US 1,072,281
Granted Patent S1
US 1,072,281 · App. 29/984,278 · Granted Apr 22, 2025

Extension ladder

Inventor: Qiulan Hu (Zhejiang, CN)
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Quick Facts
Patent No.
US 1,072,281
App. No.
29/984,278
Granted
Apr 22, 2025
Kind
S1
Claims (1)

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

Priority Claims (1)
CN 202430838127.5 · Dec 30, 2024 · national
References Cited (10)
US D610709S · Lamb · 2010 [cited by applicant]
US D799063S · Yin · 2017 [cited by applicant]
US D838385S · Moss · 2019 [cited by examiner]
US D966556S · Barker · 2022 [cited by examiner]
US D966557S · Maxfield · 2022 [cited by examiner]
US D999404S · Maxfield · 2023 [cited by examiner]
US D1026251S · Hu · 2024 [cited by examiner]
US D1056249S · Li · 2024 [cited by examiner]
US 20230374858A1 · Moss · 2023 [cited by examiner]
US 20230383601A1 · Maxfield · 2023 [cited by examiner]