Who owns the DOUWINBLE trademark?

The DOUWINBLE trademark is owned by Ping Liu.

What class is the DOUWINBLE trademark registered in?

The DOUWINBLE trademark is registered in Class 011 (Lighting, heating, cooling & sanitary apparatus).

What is the serial number for DOUWINBLE?

The USPTO serial number for DOUWINBLE is 99753292.

What is the registration number for DOUWINBLE?

DOUWINBLE is registered under USPTO registration number 8512306.

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USPTO Trademark Record

REGISTERED

DOUWINBLE

SN 99753292·Reg 8512306·Filed Apr 09, 2026

Owner Ping Liu

Apparatus and installations for lighting, heating, cooling, steam generating, cooking, drying, ventilating, water supply and sanitary purposes.

DOUWINBLE (Serial No. 99753292), Registration No. 8512306, is a registered US trademark filed on Apr 09, 2026 by Ping Liu. This trademark covers Class 011 (Lighting, heating, cooling & sanitary apparatus).

early section 8: October 20, 2032

Mark Intelligence

DOUWINBLE (Reg. #8512306) is a registered US trademark that has been protecting its owner, Ping Liu, since 2026. The mark covers Class 011 (Lighting, heating, cooling & sanitary apparatus). Goods and services include Apparatus and installations for lighting, heating, cooling, steam generating, cooking, drying, ventilating, water supply.... The mark faced 1 opposition proceeding during prosecution.

FILED

Apr 09, 2026

SERIAL

99753292

REG#

8512306

REGISTERED

Oct 20, 2026

Filing Information

StatusREGISTERED

Filing DateApr 09, 2026

Serial Number99753292