H04M 3/16
Automatic or semi-automatic exchanges: with lock-out or secrecy provision in party-line systems
Official title: with lock-out or secrecy provision in party-line systems
H04M3/16 (Automatic or semi-automatic exchanges: with lock-out or secrecy provision in party-line systems) appears on 118 US grants and 127 published applications in this corpus.
Search patents in H04M- Granted patents
- 118
- Published applications
- 127
- Assignees
- 87
- Inventors
- 249
- Latest grant
- 15 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 8 |
| 2004 | 5 | 11 |
| 2005 | 6 | 20 |
| 2006 | 13 | 16 |
| 2007 | 4 | 16 |
| 2008 | 3 | 11 |
| 2009 | 11 | 6 |
| 2010 | 7 | 5 |
| 2011 | 5 | 4 |
| 2012 | 7 | 2 |
| 2013 | 9 | 4 |
| 2014 | 4 | 4 |
| 2015 | 5 | 2 |
| 2016 | 3 | 8 |
| 2017 | 3 | 0 |
| 2018 | 5 | 2 |
| 2019 | 5 | 1 |
| 2020 | 1 | 3 |
| 2021 | 0 | 0 |
| 2022 | 2 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- User interfaces for managing contacts on another electronic device15 Apr 2025US 12,278,922 B2Apple Inc.
- User interfaces for managing contacts on another electronic device14 Jun 2022US 11,363,137 B2Apple Inc.
- Method and apparatus for interfacing analog page party system to internet protocol page party system31 May 2022US 11,349,993 B2Hubbell Incorporated
- Base station device, gateway device, call connecting method, and wireless communication system21 Jul 2020US 10,721,738 B2Sun Patent Trust
- Method and system to enable secure communication for inter-eNB transmission31 Dec 2019US 10,524,120 B2Samsung Electronics Co., Ltd.
- User interfaces for managing contacts on another electronic device14 Aug 2025US 2025/0260765 A1Apple Inc.
- User interfaces for managing contacts on another electronic device22 Sep 2022US 2022/0303387 A1Apple Inc.
- User interfaces for managing contacts on another electronic device3 Dec 2020US 2020/0382637 A1Apple Inc.
- Method and apparatus for interfacing analog page party system to internet protocol page party system16 Jul 2020US 2020/0228661 A1Hubbell Incorporated
- Dynamic agent media type selection based on communication session quality of service parameters16 Apr 2020US 2020/0120211 A1Avaya Inc.
Most cited
By later US patents
- Method and apparatus for providing secure wireless communication365US 7,496,347 B2Velocita Wireless LLC · 2009
- Member-supported mobile payment system273US 8,249,965 B2Obopay Inc. · 2012
- System and method for securing voice mail messages250US 6,741,705 B1Cisco Technology, Inc. · 2004
- Information storage device for storing personal identification information232US 5,825,871 ASmart Tone Authentication, Inc. · 1998
- System and method using personal identification numbers and associated prompts for controlling unauthorized use of a security device and unauthorized access to a resource230US 5,745,555 ASmart Tone Authentication, Inc. · 1998