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
Other references
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- Alibaba. Link: https://www.alibaba.com/product-detail/CR39-eyeglass-demo-lens_60543334591.html. Visited May 7, 2019. CR39 eyeglass demo lens. (Year: 2019).
Patent History
Patent number: D858631
Type: Grant
Filed: Sep 27, 2018
Date of Patent: Sep 3, 2019
Assignee: Carl Zeiss Vision International GmbH (Aalen)
Inventor: Seo Ji Ye (Anyangsi)
Primary Examiner: Susan Bennett Hattan
Assistant Examiner: Lauren D McVey
Application Number: 29/664,726
Type: Grant
Filed: Sep 27, 2018
Date of Patent: Sep 3, 2019
Assignee: Carl Zeiss Vision International GmbH (Aalen)
Inventor: Seo Ji Ye (Anyangsi)
Primary Examiner: Susan Bennett Hattan
Assistant Examiner: Lauren D McVey
Application Number: 29/664,726
Classifications