H04Q 5/02
Selecting arrangements wherein two or more subscriber stations are connected by the
Official title: with direct connection for all subscribers, i.e. party-line systems (H04Q5/24 takes precedence)
H04Q5/02 (Selecting arrangements wherein two or more subscriber stations are connected by the) appears on 38 US grants and 4 published applications in this corpus.
Search patents in H04Q- Granted patents
- 38
- Published applications
- 4
- Assignees
- 23
- Inventors
- 56
- Latest grant
- 23 May 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 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 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Systems and methods for communication on a series connection23 May 2023US 11,659,305 B2Kinetic Technologies International Holdings LP
- Systems and methods for communication on a series connection29 Nov 2022US 11,516,559 B2Kinetic Technologies International Holdings LP
- Systems and methods for pulse-based communication25 Aug 2020US 10,757,484 B2Kinetic Technologies
- System and method for completing two calls using analog interface to telephone network25 Mar 2003US 6,539,086 B2AT&T Corp.
- System and method for completing a call while at least one call is established using analog interface to telephone network30 Jul 2002US 6,427,007 B1AT&T Corp.
- Systems and methods for communication on a series connection1 Dec 2022US 2022/0385998 A1Kinetic Technologies International Holdings LP
- Systems and methods for pulse-based communication5 Nov 2020US 2020/0351575 A1Kinetic Technologies
- Systems and methods for pulse-based communication5 Jul 2018US 2018/0191522 A1Kinetic Technologies
- System and method for completing two calls using analog interface to telephone network6 Jun 2002US 2002/0067819 A1AT&T Corp.
Most cited
By later US patents
- Communication circuit with combined power feed and data transmission over a phantom channel71US 4,173,714 ATIE/Communications, Inc. · 1979
- Terminal connection device52US 5,253,289 AMurata Kikai Kabushiki Kaisha · 1993
- Identification of called directory number at multiple directory number per line premises prior to ringing signal reception41US 5,544,235 AAT&T Corp. · 1996
- Added main line apparatus40US 5,140,630 ALight Logic, Ltd. · 1992
- Telephone answering system and apparatus for direct caller selection of a party line extension33US 5,086,458 AProduct Engineering & Manufacturing, Inc. · 1992