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last 30 patents
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Patent Grant
Particulate sound barrier and sound absorption/insulation board the...
Patent number
9,607,599
Issue date
Mar 28, 2017
SICHUAN ZISEN ACOUSTICS TECHNICAL CO., LTD.
Weixin Qian
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Particulate sound absorption board and preparation method thereof
Patent number
9,607,597
Issue date
Mar 28, 2017
SICHUAN ZISEN ACOUSTICS TECHNICAL CO., LTD.
Weixin Qian
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Patents Applications
last 30 patents
Information
Patent Application
Particulate Sound Barrier and Sound Absorption/Insulation Board The...
Publication number
20160118034
Publication date
Apr 28, 2016
SICHUAN ZISEN ACOUSTICS TECHNICAL CO., LTD.
Weixin QIAN
B32 - LAYERED PRODUCTS
Information
Patent Application
Particulate Sound Absorption Board and Preparation Method Thereof
Publication number
20160111076
Publication date
Apr 21, 2016
SICHUAN ZISEN ACOUSTICS TECHNICAL CO., LTD.
Weixin QIAN
G10 - MUSICAL INSTRUMENTS ACOUSTICS