US Patent 7204268 Internal pressure equilibrium device for airtight space
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Patent abstract
The invention relates to an internal pressure equilibrium adjustment device for airtight space with rapid operation and simple structure.
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US Patent 07204268 Internal pressure equilibrium device for airtight space US Patent 7204268 Internal pressure equilibrium device for airtight space
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Patent Number
0720426800
Patent Number
720426800
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Official Website
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Infobox
Is a
Patent Jurisdiction
Patent Number
072042680
Date of Patent
April 17, 2007
0Patent Application Number
110538660
Date Filed
February 10, 2005
0Official Website
Patent Primary Examiner
Edits on 25 Sep, 2022
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
072042680
Date of Patent
April 17, 2007
0Patent Application Number
110538660
Date Filed
February 10, 2005
0Official Website
Patent Primary Examiner
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Golden AI
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US Patent 07204268 Internal pressure equilibrium device for airtight space
Infobox
Is a
Patent jurisdiction
Patent number
07204268
Date of patent
April 17, 2007
Patent application number
11053866
Date Filed
February 10, 2005
Patent primary examiner
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