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Hao-Yao Chang
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Yuanlin City, TW
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last 30 patents
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Patent Grant
Muffler structure
Patent number
11,280,235
Issue date
Mar 22, 2022
Guang Rong Enterprise Co., Ltd.
Hao-Yao Chang
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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last 30 patents
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Patent Application
Muffler Structure
Publication number
20210003053
Publication date
Jan 7, 2021
Guang Rong Enterprise Co., Ltd.
Hao-Yao Chang
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES