Tetsumasa Yoshikawa

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San Francisco, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
System and method of caller verification
- Patent number 12,170,742
- Issue date Dec 17, 2024
- RINGCENTRAL, INC.
- Christopher van Rensburg
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System and method of caller verification
- Patent number 11,595,515
- Issue date Feb 28, 2023
- RINGCENTRAL, INC.
- Christopher van Rensburg
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and phone system for pre-call quality of service assessment...
- Patent number 9,936,434
- Issue date Apr 3, 2018
- RINGCENTRAL, INC.
- Patrice Khawam
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
SYSTEM AND METHOD OF CALLER VERIFICATION
- Publication number 20210099573
- Publication date Apr 1, 2021
- RingCentral, Inc.
- Christopher van Rensburg
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
METHOD AND PHONE SYSTEM FOR PRE-CALL QUALITY OF SERVICE ASSESSMENT...
- Publication number 20170374594
- Publication date Dec 28, 2017
- RingCentral, Inc.
- Patrice KHAWAM
- H04 - ELECTRIC COMMUNICATION TECHNIQUE