H04R 1/225
For telephonic receivers
Official title: {for telephonic receivers}
H04R1/225 (For telephonic receivers) appears on 120 US grants and 74 published applications in this corpus.
Search patents in H04R- Granted patents
- 120
- Published applications
- 74
- Assignees
- 74
- Inventors
- 210
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 7 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 4 | 3 |
| 2003 | 5 | 2 |
| 2004 | 4 | 4 |
| 2005 | 0 | 3 |
| 2006 | 6 | 7 |
| 2007 | 3 | 4 |
| 2008 | 2 | 2 |
| 2009 | 2 | 3 |
| 2010 | 2 | 7 |
| 2011 | 3 | 0 |
| 2012 | 5 | 3 |
| 2013 | 3 | 0 |
| 2014 | 4 | 3 |
| 2015 | 3 | 5 |
| 2016 | 3 | 2 |
| 2017 | 4 | 5 |
| 2018 | 2 | 4 |
| 2019 | 5 | 5 |
| 2020 | 6 | 4 |
| 2021 | 3 | 3 |
| 2022 | 2 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 2 |
| 2025 | 0 | 0 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus and method for generating a first control signal and a second control signal by using a linearization and/or a bandwidth extension25 Aug 2026US 12,720,254 B2Kaetel Systems GmbH
- Sound providing method using earphone set and earphone set19 May 2026US 12,634,618 B2Cotron Corporation
- Linear movement bistable electromagnetic switch7 May 2024US 11,979,708 B2Chuandong Magnetic Electronics Co., Ltd.
- Mobile terminal with at least two transducers1 Aug 2023US 11,716,583 B2DRNC Holdings, Inc.
- Mobile terminal with at least two transducers8 Mar 2022US 11,272,303 B2DRNC Holdings, Inc.
- Sound providing method using earphone set and earphone set8 Aug 2024US 2024/0267670 A1Cotron Corporation
- Apparatus and method for generating a first control signal and a second control signal by using a linearization and/or a bandwidth extension1 Feb 2024US 2024/0040303 A1Kaetel Systems GmbH
- Dynamic speaker coils as radio frequency antennas in mobile computing devices6 Jul 2023US 2023/0216453 A1Intel Corporation
- Mobile terminal with at least two transducers12 May 2022US 2022/0150652 A1DRNC Holdings, Inc.
- Smart speaker23 Dec 2021US 2021/0399754 A1HAJEN Co., Ltd
Most cited
By later US patents
- Earphone254US 4,646,872 ASony Corporation · 1987
- Integrated electroacoustic transducer145US 4,533,795 AAmerican Telephone and Telegraph Company · 1985
- Hearing aid receiver with plural transducers106US 4,109,116 A1978
- Earpiece acoustics85US 6,473,625 B1Nokia Mobile Phones Ltd. · 2002
- Smart speaker84US 11,206,052 B1HAJEN Co., Ltd · 2021