H04M 1/20
Arrangements for preventing acoustic feed-back
Official title: Arrangements for preventing acoustic feed-back (H04M1/62 takes precedence)
H04M1/20 (Arrangements for preventing acoustic feed-back) appears on 64 US grants and 43 published applications in this corpus.
Search patents in H04M- Granted patents
- 64
- Published applications
- 43
- Assignees
- 40
- Inventors
- 113
- Latest grant
- 25 Apr 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 3 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 3 |
| 2007 | 2 | 3 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 4 | 2 |
| 2012 | 0 | 3 |
| 2013 | 2 | 4 |
| 2014 | 3 | 2 |
| 2015 | 5 | 4 |
| 2016 | 2 | 4 |
| 2017 | 7 | 2 |
| 2018 | 1 | 0 |
| 2019 | 3 | 2 |
| 2020 | 4 | 4 |
| 2021 | 3 | 3 |
| 2022 | 0 | 0 |
| 2023 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Techniques for howling detection25 Apr 2023US 11,638,094 B2Cirrus Logic, Inc.
- Voice processing method, apparatus, electronic device, and storage medium21 Feb 2023US 11,587,574 B2Beijing Dajia Internet Information Technology Co., Ltd.
- Systems and methods for echo management in conferencing over a network using multiplexed multicast14 Dec 2021US 11,201,968 B2Johnson Controls Fire Protection LP
- Estimating averaged noise component in a microphone signal4 May 2021US 10,999,418 B2Imagination Technologies Limited
- Systems and methods for echo management in conferencing over a network using multiplexed mixed multicast23 Mar 2021US 10,958,791 B2Johnson Controls Fire Protection LP
- Voice processing method, apparatus, electronic device, and storage medium2 Dec 2021US 2021/0375298 A1Beijing Dajia Internet Information Technology Co., Ltd.
- Speaker device and speaker unit25 Nov 2021US 2021/0368249 A1Trigence Semiconductor, Inc.
- Techniques for howling detection15 Jul 2021US 2021/0219055 A1Cirrus Logic International Semiconductor Ltd.
- Systems and methods for echo management in conferencing over a network using multiplexed multicast22 Oct 2020US 2020/0336598 A1Johnson Controls Fire Protection LP
- Systems and methods for echo management in conferencing over a network using multiplexed mixed multicast22 Oct 2020US 2020/0336599 A1Johnson Controls Fire Protection LP
Most cited
By later US patents
- Loudspeaking telephone station including directional microphone162US 5,121,426 AAT&T Bell Laboratories · 1992
- Low-feedback compact wireless telephone74US 5,819,183 AMicroTalk Technologies, Inc. · 1998
- Remotely installed transmitter and a hands-free two-way voice terminal device using same65US 6,272,360 B1Pan Communications, Inc. · 2001
- Full-duplex speakerphone circuit including a control interface64US 6,212,273 B1Crystal Semiconductor Corporation · 2001
- MIC covering detection in personal audio devices47US 8,958,571 B2Cirrus Logic, Inc. · 2015