Is a
Patent attributes
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Jae Kyung Kim0
Young Bok Yoon0
Date of Patent
April 6, 2021
0Patent Application Number
164605370
Date Filed
July 2, 2019
0Patent Citations
Patent Citations Received
Patent Primary Examiner
Patent abstract
An aperture stop includes a housing, a blades disposed in the housing and rotated to form an incident hole having variable sizes, and a driver to rotatably move the blades. Each of the blades includes a through hole and protrusions disposed on an internal surface of the through hole forming the incident hole.
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