Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Chia-Chun Chang0
Date of Patent
February 1, 2011
Patent Application Number
12342234
Date Filed
December 23, 2008
Patent Primary Examiner
Patent abstract
An aperture stop includes a body and a black film. The body is stainless steel and the black film is disposed on at least two corresponding ends of the body. A manufacturing method of the aperture stop is also provided. The aperture stop is produced using the characteristics of the stainless steel body.
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