US Patent 9574790 Air duct and air flow system
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Patent abstract
An air duct of this disclosure includes: a tubular duct body formed from a non-air-permeable material; and a tubular opening end member formed from an air-permeable material. The opening end member is integrated with an end portion of the duct body so as to extend a duct wall of the duct body. D representing a diameter of the opening end member and L representing a length thereof satisfy a relationship 0.1D≦L≦1.5D. An air permeability of the air-permeable material is in a range of 0.3 to 100 sec/300 cc.
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US Patent 09574790 Air duct and air flow system US Patent 9574790 Air duct and air flow system
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Patent Number
0957479000
Patent Number
957479000
Edits on 24 May, 2023
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Patent Jurisdiction
Patent Number
095747900
Date of Patent
February 21, 2017
0Patent Application Number
148675600
Date Filed
September 28, 2015
0Official Website
Patent Primary Examiner
Edits on 24 Sep, 2022
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Is a
Patent Jurisdiction
Patent Number
095747900
Date of Patent
February 21, 2017
0Patent Application Number
148675600
Date Filed
September 28, 2015
0Official Website
Patent Primary Examiner
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US Patent 09574790 Air duct and air flow system
Infobox
Is a
Patent jurisdiction
Patent number
09574790
Date of patent
February 21, 2017
Patent application number
14867560
Date Filed
September 28, 2015
Patent primary examiner
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