H04B 1/581
Using a transformer
Official title: {using a transformer}
H04B1/581 (Using a transformer) appears on 95 US grants and 64 published applications in this corpus.
Search patents in H04B- Granted patents
- 95
- Published applications
- 64
- Assignees
- 53
- Inventors
- 149
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 3 |
| 2003 | 2 | 0 |
| 2004 | 2 | 2 |
| 2005 | 2 | 1 |
| 2006 | 1 | 3 |
| 2007 | 1 | 0 |
| 2008 | 5 | 0 |
| 2009 | 3 | 0 |
| 2010 | 1 | 2 |
| 2011 | 2 | 6 |
| 2012 | 1 | 2 |
| 2013 | 6 | 5 |
| 2014 | 5 | 4 |
| 2015 | 4 | 2 |
| 2016 | 3 | 2 |
| 2017 | 4 | 4 |
| 2018 | 4 | 5 |
| 2019 | 4 | 6 |
| 2020 | 7 | 2 |
| 2021 | 1 | 3 |
| 2022 | 4 | 2 |
| 2023 | 4 | 4 |
| 2024 | 4 | 2 |
| 2025 | 2 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Compact RF front-end module and method of packaging26 May 2026US 12,640,771 B2Avago Technologies International Sales Pte. Limited
- Electronic control device16 Dec 2025US 12,500,795 B2Panasonic Intellectual Property Management Co., Ltd.
- RF transceiver2 Dec 2025US 12,489,474 B2Csem Centre Suisse D'Electronique Et De Microtechnique SA—Recherche Et DéVeloppement
- Radio frequency circuit and adjustable transformer26 Nov 2024US 12,155,355 B2Huawei Technologies Co., Ltd.
- Switch with electrostatic discharge (ESD) protection4 Jun 2024US 12,002,769 B2QUALCOMM Incorporated
- Methods, devices and systems for radio frequency circuit having receive-transmit co-matching network2 Apr 2026US 2026/0095204 A1Cypress Semiconductor Corporation
- Front end architecture with converged 2g and 5g broadband4 Dec 2025US 2025/0373279 A1
- Compact rf front-end module and method of packaging10 Apr 2025US 2025/0119175 A1Avago Technologies International Sales Pte. Limited
- Electronic control device11 Apr 2024US 2024/0121138 A1Panasonic Intellectual Property Management Co., Ltd.
- Rf transceiver11 Jan 2024US 2024/0014835 A1Csem Centre Suisse D'Electronique Et De Microtechnique SA—Recherche Et DéVeloppement
Most cited
By later US patents
- Active resistive summer for a transformer hybrid144US 6,775,529 B1Marvell International Ltd. · 2004
- Apparatus and method of implementing a universal home network on a customer premises ISDN bus76US 6,522,728 B1Advanced Micro Devices, Inc. · 2003
- Integrated circuit radio front-end architecture and applications thereof39US 7,209,727 B2Broadcom Corporation · 2007
- Class B driver37US 6,844,837 B1Marvell International Ltd. · 2005
- Trifila balun for wireless transceiver28US 8,279,018 B1Marvell International Ltd. · 2012