H03M 3/04
Differential modulation with several bits
Official title: Differential modulation with several bits {, e.g. differential pulse code modulation [DPCM] (H03M3/30 takes precedence)}
H03M3/04 (Differential modulation with several bits) appears on 115 US grants and 43 published applications in this corpus.
Search patents in H03M- Granted patents
- 115
- Published applications
- 43
- Assignees
- 74
- Inventors
- 202
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 6 | 0 |
| 1988 | 3 | 0 |
| 1989 | 6 | 0 |
| 1990 | 5 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 2 | 1 |
| 2013 | 1 | 2 |
| 2014 | 1 | 1 |
| 2015 | 2 | 4 |
| 2016 | 4 | 1 |
| 2017 | 1 | 2 |
| 2018 | 3 | 2 |
| 2019 | 3 | 2 |
| 2020 | 4 | 4 |
| 2021 | 2 | 2 |
| 2022 | 5 | 10 |
| 2023 | 3 | 2 |
| 2024 | 7 | 1 |
| 2025 | 3 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Differential successive approximation register analog-to-digital converter with dynamic input common-mode voltage control and associated method17 Mar 2026US 12,580,583 B2Airoha Technology Corp.
- Voltage monitoring of switching drivers16 Dec 2025US 12,500,601 B2Cirrus Logic, Inc.
- Intra coded video using quantized residual differential pulse code modulation coding19 Aug 2025US 12,395,623 B2Bytedance Inc.
- Intra coded video using quantized residual differential pulse code modulation coding22 Jul 2025US 12,368,844 B2Bytedance Inc.
- Multiplication and accumulation circuit based on radix-4 booth code and differential weight8 Oct 2024US 12,112,143 B2Zhejiang University
- Hybrid adc13 Aug 2026US 2026/0238217 A1Mitsumi Electric Co., Ltd.
- A/d conversion device and battery monitoring integrated circuit device2 Jul 2026US 2026/0189240 A1Denso Corporation
- Differential successive approximation register analog-to-digital converter with dynamic input common-mode voltage control and associated method27 Nov 2025US 2025/0365004 A1Airoha Technology Corp.
- Voltage monitoring of switching drivers27 Feb 2025US 2025/0070795 A1Cirrus Logic International Semiconductor Ltd.
- Intra coded video using quantized residual differential pulse code modulation coding11 Apr 2024US 2024/0121381 A1Bytedance Inc.
Most cited
By later US patents
- Adaptive prediction differential PCM-type transmission apparatus and process with shaping of the quantization noise124US 4,385,393 AL'Etat Francais represente par le Secretaire d'Etat · 1983
- DPCM system with rate-of-fill control of buffer occupancy85US 4,706,260 ARCA Corporation · 1987
- ADPCM coder-decoder including partial band energy transition detection65US 4,677,423 AAmerican Telephone and Telegraph Company, AT&T Bell Laboratories · 1987
- Compression and expansion technique for digital audio data60US 5,083,310 AApple Computer, Inc. · 1992
- Predictive speech signal coding with reduced noise effects58US 4,133,976 ABell Telephone Laboratories, Incorporated · 1979