Invention Grant
- Patent Title: Speakerphone with echo canceller-suppressor
- Patent Title (中): 电话机免提和补偿抑制器的回声。
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Application No.: EP90305862.6Application Date: 1990-05-30
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Publication No.: EP0400979B1Publication Date: 1995-10-25
- Inventor: Ford, William Albert
- Applicant: AT&T Corp.
- Applicant Address: 32 Avenue of the Americas New York, NY 10013-2412 US
- Assignee: AT&T Corp.
- Current Assignee: AT&T Corp.
- Current Assignee Address: 32 Avenue of the Americas New York, NY 10013-2412 US
- Agency: Johnston, Kenneth Graham
- Priority: US358030 19890530
- Main IPC: H04M9/08
- IPC: H04M9/08 ; H04B3/20
Public/Granted literature
- EP0400979A3 Speakerphone with echo canceller-suppressor Public/Granted day:1992-04-22
Information query
