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			 The ornamental design for an endoscope operating unit, as shown and described. 
			  
			  
			  
			  
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The broken lines showing the remainder thereof are for environmental purposes only and form no part of the claimed design.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc | 
| May 17 2017 | Olympus Corporation | (assignment on the face of the patent) | / | |||
| Jun 05 2017 | FUNAKOSHI, YASUO | Olympus Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 042916 | /0945 | 
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