H04M 9/001
Two-way communication systems between a limited number of parties
Official title: {Two-way communication systems between a limited number of parties}
H04M9/001 (Two-way communication systems between a limited number of parties) appears on 62 US grants and 36 published applications in this corpus.
Search patents in H04M- Granted patents
- 62
- Published applications
- 36
- Assignees
- 38
- Inventors
- 99
- Latest grant
- 7 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 2 |
| 2006 | 3 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 2 |
| 2013 | 2 | 0 |
| 2014 | 0 | 1 |
| 2015 | 2 | 1 |
| 2016 | 1 | 0 |
| 2017 | 1 | 2 |
| 2018 | 2 | 3 |
| 2019 | 6 | 9 |
| 2020 | 3 | 0 |
| 2021 | 1 | 5 |
| 2022 | 3 | 3 |
| 2023 | 2 | 1 |
| 2024 | 3 | 0 |
| 2025 | 4 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Audio device and control method thereof7 Oct 2025US 12,438,989 B2Merry Electronics(Shenzhen) Co., Ltd.
- In-home event intercom and notifications2 Sep 2025US 12,406,562 B2Apple Inc.
- Multiple dwelling house interphone system4 Feb 2025US 12,219,085 B2Aiphone Co., Ltd.
- Programmable signal generator and radio controller7 Jan 2025US 12,193,118 B2
- Wireless intercom system and group pairing method of wireless intercom system26 Mar 2024US 11,943,394 B2Sena Technologies Inc.
- In-home event intercom and notifications20 Nov 2025US 2025/0356750 A1Apple Inc.
- Audio device and control method thereof6 Mar 2025US 2025/0080658 A1Merry Electronics(Shenzhen) Co., Ltd.
- In-home event intercom and notifications9 Nov 2023US 2023/0360507 A1Apple Inc.
- Multiple dwelling house interphone system1 Dec 2022US 2022/0385766 A1Aiphone Co., Ltd.
- Volume control over shared trunk lines in intercom systems24 Nov 2022US 2022/0377180 A1Robert Bosch GmbH
Most cited
By later US patents
- Intercom apparatus for integrating disparate audio sources for use in light aircraft or similar high noise environments326US 4,941,187 A1990
- Entrance intercom system177US 7,065,196 B22006
- Methods and systems for communication from an exterior of a location175US 7,085,361 B2BellSouth Intellectual Property Corporation · 2006
- Vehicle communication system133US 8,483,775 B2Nuance Communications, Inc. · 2013
- Method and apparatus for installing telephone intercom-voice messaging apparatus at doorbell for dwelling107US 5,784,446 ACMS Investors · 1998