Patent · US Active

Noise reduction earplug

USD980966S1 · kind S1 · design

23Cited by

63References

1Claims

0Family size

Assignee

Sha Huang · CN

Inventors

Hao Hu · Belmont, US
Keqiang Deng · Oldsmar, US
Feng Cui · Lo Wu, CN
Xiangen Zhao · Lo Wu, CN

Key dates

Filing date	Nov 2, 2021
Grant date	Mar 14, 2023
Priority date	—
Expiry date	Mar 14, 2038

Classification

Technology area (CPC —)General

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.