Zhen Sun

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Boston, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Presence detection using ultrasonic signals with concurrent audio p...
- Patent number 11,564,036
- Issue date Jan 24, 2023
- Amazon Technologies, Inc.
- Krishna Kamath Koteshwara
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Acoustic unit for wearable device
- Patent number 11,402,641
- Issue date Aug 2, 2022
- Amazon Technologies, Inc.
- Jianchun Dong
- G02 - OPTICS