H04Q 1/18
Electrical details
H04Q1/18 (Electrical details) appears on 1,029 US grants and 343 published applications in this corpus.
Search patents in H04Q- Granted patents
- 1,029
- Published applications
- 343
- Assignees
- 476
- Inventors
- 1,753
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 41 | 0 |
| 1977 | 35 | 0 |
| 1978 | 28 | 0 |
| 1979 | 14 | 0 |
| 1980 | 29 | 0 |
| 1981 | 12 | 0 |
| 1982 | 20 | 0 |
| 1983 | 19 | 0 |
| 1984 | 18 | 0 |
| 1985 | 23 | 0 |
| 1986 | 26 | 0 |
| 1987 | 25 | 0 |
| 1988 | 16 | 0 |
| 1989 | 30 | 0 |
| 1990 | 20 | 0 |
| 1991 | 12 | 0 |
| 1992 | 21 | 0 |
| 1993 | 22 | 0 |
| 1994 | 34 | 0 |
| 1995 | 39 | 0 |
| 1996 | 23 | 0 |
| 1997 | 26 | 0 |
| 1998 | 31 | 0 |
| 1999 | 35 | 0 |
| 2000 | 30 | 0 |
| 2001 | 23 | 7 |
| 2002 | 26 | 33 |
| 2003 | 21 | 32 |
| 2004 | 30 | 31 |
| 2005 | 20 | 20 |
| 2006 | 30 | 16 |
| 2007 | 26 | 26 |
| 2008 | 7 | 9 |
| 2009 | 14 | 12 |
| 2010 | 19 | 10 |
| 2011 | 14 | 13 |
| 2012 | 12 | 7 |
| 2013 | 16 | 5 |
| 2014 | 14 | 9 |
| 2015 | 17 | 8 |
| 2016 | 13 | 15 |
| 2017 | 7 | 9 |
| 2018 | 15 | 20 |
| 2019 | 21 | 16 |
| 2020 | 16 | 14 |
| 2021 | 12 | 8 |
| 2022 | 5 | 6 |
| 2023 | 3 | 2 |
| 2024 | 9 | 9 |
| 2025 | 5 | 4 |
| 2026 | 5 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04Q 1/30Signalling arrangements785
- H04Q 1/20Testing circuits or apparatus208
- H04Q 1/28Current-supply circuits or arrangements for selection equipment at exchanges28
- H04Q 1/56Balancing circuitry switched-on automatically in dependence on automatically-selected lines3
- H04Q 1/54Amplifier switched-on automatically in dependence on automatically-selected lines2
Recent patents
- Device for detection of a clipped ringing signal22 Sep 2026US 12,745,022 B2Nuvoton Technology Corporation
- System, method, and apparatus for detecting call interception11 Aug 2026US 12,707,265 B2University of Florida Research Foundation, Inc.
- Seafloor observation network-based subsurface buoy device with real-time power supplying and high-speed data transmitting23 Jun 2026US 12,666,178 B2Institute of Acoustics, Chinese Academy of Sciences
- Call classification through analysis of DTMF events5 May 2026US 12,621,382 B2Pindrop Security, Inc.
- Remote control device, electronic device and control methods thereof6 Jan 2026US 12,520,000 B2Samsung Electronics Co., Ltd.
- Call classification through analysis of dtmf events17 Sep 2026US 2026/0281227 A1Pindrop Security, Inc.
- Remote control device, electronic device and control methods thereof2 Apr 2026US 2026/0095613 A1Samsung Electronics Co., Ltd.
- Systems and methods for processing data proximate to the point of collection20 Nov 2025US 2025/0358550 A1R9 Labs, LLC
- Methods and equipment for reducing power loss in radio systems24 Jul 2025US 2025/0239935 A1Outdoor Wireless Networks LLC
- Port-to-Port Visual Identification System20 Mar 2025US 2025/0097610 A1
Most cited
By later US patents
- Telephone system for connecting a customer to a supplier of goods744US 4,757,267 AApplied Telematics, Inc. · 1988
- Call routing based on the caller's mood398US 6,411,687 B1Mitel Knowledge Corporation · 2002
- Method and apparatus for telephonically accessing and navigating the internet268US 5,953,392 ANetphonic Communications, Inc. · 1999
- Speech encoding in a client server system250US 6,594,347 B1International Business Machines Corporation · 2003
- Information storage device for storing personal identification information232US 5,825,871 ASmart Tone Authentication, Inc. · 1998