Core Viewpoint - Google LLC has obtained a patent for "Text Echo Cancellation," with the announcement number CN115699170 B, and the application date is March 2021 [1] Summary by Categories - **Patent Information** - The patent titled "Text Echo Cancellation" has been granted to Google LLC [1] - The official announcement number for the patent is CN115699170 B [1] - The application for the patent was submitted on March 2021 [1]