H04B 1/64
Volume compression or expansion arrangements
H04B1/64 (Volume compression or expansion arrangements) appears on 97 US grants and 14 published applications in this corpus.
Search patents in H04B- Granted patents
- 97
- Published applications
- 14
- Assignees
- 66
- Inventors
- 130
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 9 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 7 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 3 | 3 |
| 2004 | 2 | 1 |
| 2005 | 1 | 1 |
| 2006 | 2 | 1 |
| 2007 | 1 | 1 |
| 2008 | 1 | 0 |
| 2009 | 1 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 2 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 2 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Radio data communication system and method6 Jan 2026US 12,519,504 B2NXP USA, Inc.
- Decode signal compensation in a wireless system12 Aug 2025US 12,388,501 B2Charter Communications Operating, LLC
- Decode signal compensation in a wireless system7 Nov 2023US 11,811,470 B2Charter Communications Operating, LLC
- Analog signal transfer system, variable compressor, and variable expander19 Jul 2016US 9,398,371 B2Kabushiki Kaisha Audio-Technica
- Signal transmitting device and signal transmitting method17 May 2016US 9,344,143 B2Mediatek Inc.
- Radio data communication system and method4 Jul 2024US 2024/0223236 A1NXP USA, Inc.
- Decode signal compensation in a wireless system8 Feb 2024US 2024/0048194 A1Charter Communications Operating, LLC
- Decode signal compensation in a wireless system13 Jul 2023US 2023/0223996 A1Charter Communications Operating, LLC
- Signal transmitting device and signal transmitting method30 Jan 2014US 2014/0029694 A1Mediatek Inc.
- Analog Signal Transfer System, Variable Compressor, and Variable Expander13 Jun 2013US 2013/0151261 A1Kabushiki Kaisha Audio-Technica
Most cited
By later US patents
- Multi-band programmable compression system142US 4,882,762 AResound Corporation · 1989
- Digital signal/noise ratio amplifier apparatus for a communication system137US 4,295,223 AWestinghouse Electric Corp. · 1981
- Apparatus for enhancing sensitivity in compressive receivers and method for the same109US 5,901,348 AAIL Systems, Inc. · 1999
- Audio signal transmission system having noise reduction means63US 4,677,645 AHitachi, Ltd. · 1987
- Background noise compensation in a telephone network57US 5,485,515 AAT&T Corp. · 1996