Add-on for a smartphone for smartphone-based photorefraction

USD920300S1 · kind S1 · design

Assignees

• Carl Zeiss Vision International GmbH · DE
• Carl Zeiss Shanghai Co. Ltd. · CN

Inventors

• Tobias Breuninger · Bad Kissingen, DE
• Xiao Han · Lo Wu, CN

Key dates

• Filing date: Sep 18, 2018
• Grant date: May 25, 2021
• Expiry date: May 25, 2036

Classification

• Technology area (CPC —): General