H04M 1/70
Lock-out or secrecy arrangements in party-line systems
H04M1/70 (Lock-out or secrecy arrangements in party-line systems) appears on 38 US grants and 9 published applications in this corpus.
Search patents in H04M- Granted patents
- 38
- Published applications
- 9
- Assignees
- 17
- Inventors
- 54
- Latest grant
- 5 Apr 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 1 | 2 |
| 2015 | 1 | 2 |
| 2016 | 0 | 0 |
| 2017 | 2 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 2 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Complex computing network for generating and handling a waitlist associated with a speaker in an audio conversation on a mobile application5 Apr 2022US 11,297,469 B2Stereo App Limited
- Complex computing network for establishing audio communication between users on a mobile application1 Mar 2022US 11,265,685 B1Stereo App Limited
- Complex computing network for improving establishment and broadcasting of audio communication among mobile computing devices and for improving speaker-listener engagement using audio conversation control2 Nov 2021US 11,165,911 B1Stereo App Limited
- Cellular device security apparatus and method2 May 2017US 9,642,002 B2
- Cellular device security apparatus and method25 Apr 2017US 9,635,544 B2
- Complex Computing Network For Establishing Audio Communication Between Users On A Mobile Application3 Mar 2022US 2022/0070627 A1Stereo App Limited
- Complex computing network for generating and handling a waitlist associated with a speaker in an audio conversation on a mobile application3 Mar 2022US 2022/0070628 A1Stereo App Limited
- Cellular device security apparatus and method7 May 2015US 2015/0126159 A1
- Cellular device security apparatus and method7 May 2015US 2015/0126160 A1
- Cellular device security apparatus and method11 Sep 2014US 2014/0256289 A1
Most cited
By later US patents
- Telephone privacy device50US 5,231,658 A1993
- Multiparty line adapter with privacy feature controlled by reversal of line polarity at a central power source44US 4,528,424 AInternational Telephone and Telegraph Corporation · 1985
- Automatic telephone line sharing and lockout apparatus44US 4,805,210 A1989
- Distributed privacy oriented telephone extension system43US 4,703,499 A1987
- Exclusionary device for coupling plural telephonic devices to a single central office trunk29US 4,825,465 ATelecommunication Concepts, Inc. · 1989