H04B 3/548
The power on the line being dc
Official title: {the power on the line being DC (arrangements for feeding power H04L12/10; extracting feeding power from signals H04L25/02)}
H04B3/548 (The power on the line being dc) appears on 631 US grants and 683 published applications in this corpus.
Search patents in H04B- Granted patents
- 631
- Published applications
- 683
- Assignees
- 406
- Inventors
- 1,276
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 1 |
| 2002 | 4 | 6 |
| 2003 | 2 | 5 |
| 2004 | 5 | 8 |
| 2005 | 3 | 11 |
| 2006 | 8 | 14 |
| 2007 | 12 | 11 |
| 2008 | 7 | 20 |
| 2009 | 5 | 13 |
| 2010 | 13 | 21 |
| 2011 | 13 | 16 |
| 2012 | 12 | 38 |
| 2013 | 17 | 39 |
| 2014 | 23 | 44 |
| 2015 | 28 | 34 |
| 2016 | 36 | 36 |
| 2017 | 43 | 30 |
| 2018 | 37 | 48 |
| 2019 | 53 | 42 |
| 2020 | 52 | 58 |
| 2021 | 41 | 45 |
| 2022 | 35 | 32 |
| 2023 | 39 | 39 |
| 2024 | 39 | 30 |
| 2025 | 40 | 24 |
| 2026 | 10 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Communication device and communication signal generation method29 Sep 2026US 12,750,089 B2Panasonic Intellectual Property Management Co., Ltd.
- Programmable power supplies for cellular base stations and related methods of reducing power loss in cellular systems8 Sep 2026US 12,730,469 B2Outdoor Wireless Networks LLC
- Controller area network (CAN) bus to power line carrier (PLC) systems and methods28 Jul 2026US 12,695,478 B2Enatel
- System and method for protection during inverter shutdown in distributed power installations7 Jul 2026US 12,676,488 B2Solaredge Technologies Ltd.
- Electric vehicle supply equipment for charging an electrical vehicle16 Jun 2026US 12,654,578 B2ABB E-mobility B.V.
- Electric shaver with imaging capability24 Sep 2026US 2026/0292317 A1May Patents Ltd.
- Battery charging and communications using chirp spread spectrum signal modulation16 Jul 2026US 2026/0205156 A1Enatel
- Energy transmission and communications system with remote communications interface9 Jul 2026US 2026/0192707 A1Conductix, Inc.
- Electric shaver with imaging capability9 Jul 2026US 2026/0197541 A1May Patents Ltd.
- Self-networking method for module controller, power converter, and power system2 Jul 2026US 2026/0189015 A1Sungrow (Shanghai) Co., Ltd.
Most cited
By later US patents
- Method and device for encoding and transmitting bidirectional data from a master circuit to a slave circuit319US 5,903,607 ASGS-Thomson Microelectronics S.A. · 1999
- Multiple-channel transmission over a single-wire bus305US 8,509,318 B2STMicroelectronics (Rousset) SAS · 2013
- Power feed for Ethernet telephones via Ethernet link275US 6,115,468 ACisco Technology, Inc. · 2000
- Digital data transmission253US 5,210,519 ABritish Aerospace Public Limited Company · 1993
- Data communication network providing power and message information243US 5,148,144 AEchelon Systems Corporation · 1992