H04M 1/68
Circuit arrangements for preventing eavesdropping
H04M1/68 (Circuit arrangements for preventing eavesdropping) appears on 149 US grants and 102 published applications in this corpus.
Search patents in H04M- Granted patents
- 149
- Published applications
- 102
- Assignees
- 95
- Inventors
- 295
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 6 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 4 |
| 2003 | 1 | 9 |
| 2004 | 5 | 4 |
| 2005 | 3 | 5 |
| 2006 | 5 | 5 |
| 2007 | 2 | 4 |
| 2008 | 2 | 6 |
| 2009 | 2 | 5 |
| 2010 | 4 | 1 |
| 2011 | 1 | 2 |
| 2012 | 4 | 2 |
| 2013 | 6 | 4 |
| 2014 | 4 | 6 |
| 2015 | 7 | 7 |
| 2016 | 5 | 3 |
| 2017 | 6 | 5 |
| 2018 | 3 | 4 |
| 2019 | 5 | 2 |
| 2020 | 3 | 6 |
| 2021 | 7 | 3 |
| 2022 | 5 | 5 |
| 2023 | 2 | 1 |
| 2024 | 2 | 4 |
| 2025 | 3 | 3 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Cellular device privacy systems and methods24 Feb 2026US 12,562,770 B2Integrated Solutions for Systems, Inc.
- Systems and devices for protecting privacy of a user of a mobile device23 Sep 2025US 12,425,507 B2Cirotta Tech Ltd
- Systems and methods for detecting call provenance from call audio8 Jul 2025US 12,355,914 B2Georgia Tech Research Corporation
- Systems and methods for detecting call provenance from call audio3 Jun 2025US 12,323,553 B2Georgia Tech Research Corporation
- Sound processing logic connections12 Mar 2024US 11,928,385 B2Hewlett-Packard Development Company, L. P.
- Electronic device and related sound leakage prevention method18 Jun 2026US 2026/0171065 A1Huawei Technologies Co., Ltd.
- Microphone control system and electronic device4 Jun 2026US 2026/0156409 A1Huawei Technologies Co., Ltd.
- Electronic device comprising plurality of displays, and control method thereof2 Oct 2025US 2025/0306742 A1Samsung Electronics Co., Ltd.
- Systems and methods for detecting call provenance from call audio14 Aug 2025US 2025/0260764 A1Georgia Tech Research Corporation
- Method and system for restricting forwarding of voice data on smart phone devices13 Feb 2025US 2025/0053372 A1JPMorgan Chase Bank, N. A.
Most cited
By later US patents
- Apparatus and method for initiating a transaction having acoustic data receiver that filters human voice99US 6,125,172 ALucent Technologies Inc. · 2000
- Data segmentation profiles92US 8,588,749 B1Cellco Partnership · 2013
- Lockout device for preventing telephone eavesdropping from an extension device, and method89US 5,832,057 A1998
- Portable secure-telephone communications module67US 5,454,037 AGrayline International Limited · 1995
- Initialization of handsets in a multi-line wireless phone system for secure communications54US 6,832,082 B1Thomson Licensing · 2004