H04M 1/0291
Door telephones
Official title: {Door telephones}
H04M1/0291 (Door telephones) appears on 145 US grants and 144 published applications in this corpus.
Search patents in H04M- Granted patents
- 145
- Published applications
- 144
- Assignees
- 69
- Inventors
- 257
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 5 |
| 2004 | 1 | 2 |
| 2005 | 1 | 3 |
| 2006 | 4 | 7 |
| 2007 | 0 | 3 |
| 2008 | 2 | 2 |
| 2009 | 1 | 2 |
| 2010 | 3 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 2 |
| 2013 | 2 | 2 |
| 2014 | 4 | 1 |
| 2015 | 16 | 17 |
| 2016 | 6 | 12 |
| 2017 | 12 | 16 |
| 2018 | 12 | 16 |
| 2019 | 19 | 12 |
| 2020 | 12 | 14 |
| 2021 | 7 | 3 |
| 2022 | 4 | 7 |
| 2023 | 4 | 6 |
| 2024 | 4 | 6 |
| 2025 | 2 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Video-recording doorbell6 Jan 2026US 12,520,020 B2Google Inc.
- Doorbell communication systems and methods11 Nov 2025US 12,470,424 B2SkyBell Technologies IP, LLC
- Doorbell communication systems and methods30 Sep 2025US 12,432,084 B2SkyBell Technologies IP, LLC
- Alert system, delivery system and method and door bell system29 Oct 2024US 12,132,851 B2Zipp Labs B.V.
- Doorbell communication systems and methods20 Feb 2024US 11,909,549 B2SkyBell Technologies IP, LLC
- Emergency location alert system23 Jul 2026US 2026/0212743 A1
- Doorbell communication systems and methods27 Nov 2025US 2025/0365174 A1SkyBell Technologies IP, LLC
- System and method for smart doorbell integration19 Jun 2025US 2025/0201086 A1Wyze Labs, Inc.
- Video-Recording Doorbell27 Mar 2025US 2025/0106489 A1Google Inc.
- Doorbell communication systems and methods28 Nov 2024US 2024/0396761 A1
Most cited
By later US patents
- Doorbell communication systems and methods529US 8,780,201 B1SkyBell Technologies, Inc. · 2014
- Doorbell communication systems and methods421US 8,872,915 B1SkyBell Technologies, Inc. · 2014
- Doorbell communication systems and methods392US 8,823,795 B1SkyBell Technologies, Inc. · 2014
- Doorbell communication systems and methods366US 8,842,180 B1SkyBell Technologies, Inc. · 2014
- Power outlet cameras347US 9,113,051 B1SkyBell Technologies, Inc. · 2015