H04Q 2213/19
Echo-cancelling
Official title: Echo-cancelling; Hybrid; Amplifier; Attenuator
H04Q2213/19 (Echo-cancelling) appears on 7 US grants and 1 published applications in this corpus.
Search patents in H04Q- Granted patents
- 7
- Published applications
- 1
- Assignees
- 7
- Inventors
- 18
- Latest grant
- 5 Feb 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Full-duplex communication over a shared transmission medium5 Feb 2019US 10,200,167 B2Alcatel Lucent
- Voice level controller17 Nov 1998US 5,838,785 ACanon Kabushiki Kaisha
- Method for establishing data connections in an auxiliary exchange communications installation3 Feb 1998US 5,715,300 ASiemens Aktiengesellschaft
- Terminal adapter pooling system for ISDN7 Jun 1994US 5,319,700 AKabushiki Kaisha Toshiba
- Subscriber line interface circuit for serving ISDN subscribers using echo cancellers and POTS subscribers19 Oct 1993US 5,255,317 ANEC Corporation
Most cited
By later US patents
- Equalizer for ISDN-U interface23US 4,995,031 ANorthern Telecom Limited · 1991
- Subscriber line interface circuit for serving ISDN subscribers using echo cancellers and POTS subscribers23US 5,255,317 ANEC Corporation · 1993
- Signal detection circuit not affected by minute voltage fluctuations contained in input signal and operation method therefor16US 5,050,190 AMitsubishi Denki Kabushiki Kaisha · 1991
- Terminal adapter pooling system for ISDN15US 5,319,700 AKabushiki Kaisha Toshiba · 1994
- Voice level controller4US 5,838,785 ACanon Kabushiki Kaisha · 1998