H04M 9/002
Arrangements for interconnection not involving centralised switching: with subscriber controlled access to
Official title: {with subscriber controlled access to a line, i.e. key telephone systems}
H04M9/002 (Arrangements for interconnection not involving centralised switching: with subscriber controlled access to) appears on 386 US grants and 46 published applications in this corpus.
Search patents in H04M- Granted patents
- 386
- Published applications
- 46
- Assignees
- 133
- Inventors
- 620
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 29 | 0 |
| 1977 | 23 | 0 |
| 1978 | 20 | 0 |
| 1979 | 15 | 0 |
| 1980 | 12 | 0 |
| 1981 | 8 | 0 |
| 1982 | 11 | 0 |
| 1983 | 10 | 0 |
| 1984 | 7 | 0 |
| 1985 | 21 | 0 |
| 1986 | 20 | 0 |
| 1987 | 14 | 0 |
| 1988 | 16 | 0 |
| 1989 | 12 | 0 |
| 1990 | 9 | 0 |
| 1991 | 19 | 0 |
| 1992 | 9 | 0 |
| 1993 | 11 | 0 |
| 1994 | 6 | 0 |
| 1995 | 8 | 0 |
| 1996 | 13 | 0 |
| 1997 | 9 | 0 |
| 1998 | 12 | 0 |
| 1999 | 14 | 0 |
| 2000 | 5 | 0 |
| 2001 | 3 | 5 |
| 2002 | 8 | 3 |
| 2003 | 3 | 3 |
| 2004 | 4 | 1 |
| 2005 | 2 | 1 |
| 2006 | 2 | 1 |
| 2007 | 1 | 2 |
| 2008 | 1 | 0 |
| 2009 | 1 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 3 | 0 |
| 2016 | 1 | 4 |
| 2017 | 0 | 0 |
| 2018 | 2 | 5 |
| 2019 | 5 | 6 |
| 2020 | 2 | 0 |
| 2021 | 4 | 2 |
| 2022 | 2 | 4 |
| 2023 | 4 | 1 |
| 2024 | 0 | 3 |
| 2025 | 1 | 0 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Cloud-based call routing12 May 2026US 12,627,528 B2Zoom Communications, Inc.
- Computer-programmed telephone-enabled devices for processing and managing numerous simultaneous voice conversations conducted by an individual over a computer network and computer methods of implementing thereof24 Feb 2026US 12,563,109 B2Voxsmart Limited
- Interface device for intercom access control systems21 Jan 2025US 12,206,826 B2Amazon Technologies, Inc.
- Cloud-based private branch exchange26 Dec 2023US 11,855,808 B2Zoom Video Communications, Inc.
- Computer-programmed telephone-enabled devices for processing and managing numerous simultaneous voice conversations conducted by an individual over a computer network and computer methods of implementing thereof7 Nov 2023US 11,811,973 B2Green Key Technologies, Inc.
- Cloud-Based Call Routing Using a Unified Directory13 Aug 2026US 2026/0238518 A1Zoom Communications, Inc.
- Computer-programmed telephone-enabled devices for processing and managing numerous simultaneous voice conversations conducted by an individual over a computer network and computer methods of implementing thereof18 Jun 2026US 2026/0172457 A1Voxsmart Limited
- Interface Device for Intercom Access Control Systems21 Mar 2024US 2024/0098187 A1Amazon Technologies, Inc.
- Cloud-Based Call Routing29 Feb 2024US 2024/0073061 A1Zoom Video Communications, Inc.
- Computer-programmed telephone-enabled devices for processing and managing numerous simultaneous voice conversations conducted by an individual over a computer network and computer methods of implementing thereof25 Jan 2024US 2024/0031490 A1Green Key Technologies, Inc.
Most cited
By later US patents
- Graphics based call management173US 4,653,090 AAmerican Telephone & Telegraph (AT&T) · 1987
- Smart phone integration with computer systems158US 5,799,067 AElonex I. P. Holdings, Ltd. · 1998
- Two wire voice and data subscriber loop134US 4,608,686 AMitel Corporation · 1986
- Emulation of phone extensions in a packet telephony distribution system114US 6,697,358 B22Wire, Inc. · 2004
- Signal multiplexing circuit106US 4,171,467 ABell Telephone Laboratories, Incorporated · 1979