Demonstration tool
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Description
Claims
The ornamental design for a demonstration tool, as shown and described.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
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Patent History
Patent number: D880153
Type: Grant
Filed: Jul 9, 2018
Date of Patent: Apr 7, 2020
Assignee: Carl Zeiss Vision International GmbH (Aalen)
Inventor: Matthias Marx (Gschwend)
Primary Examiner: Holly E Thurman
Application Number: 29/655,958
Type: Grant
Filed: Jul 9, 2018
Date of Patent: Apr 7, 2020
Assignee: Carl Zeiss Vision International GmbH (Aalen)
Inventor: Matthias Marx (Gschwend)
Primary Examiner: Holly E Thurman
Application Number: 29/655,958
Classifications
Current U.S. Class:
D3/274