US Patent 7753533 Display apparatus

Patent 7753533 was granted and assigned to Hitachi on July, 2010 by the United States Patent and Trademark Office.

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Patent Number

Date of Patent

July 13, 2010

Patent Application Number

11513325

Date Filed

August 31, 2006

Patent Primary Examiner

Patent abstract

In conjunction with attachment or detachment of a dust filter, a lid disposed to an inlet of a duct operates to close the inlet.

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