H04B 14/04
Using pulse code modulation
Official title: using pulse code modulation
H04B14/04 (Using pulse code modulation) appears on 358 US grants and 89 published applications in this corpus.
Search patents in H04B- Granted patents
- 358
- Published applications
- 89
- Assignees
- 171
- Inventors
- 563
- Latest grant
- 8 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 9 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 9 | 0 |
| 1981 | 6 | 0 |
| 1982 | 14 | 0 |
| 1983 | 7 | 0 |
| 1984 | 4 | 0 |
| 1985 | 19 | 0 |
| 1986 | 12 | 0 |
| 1987 | 6 | 0 |
| 1988 | 6 | 0 |
| 1989 | 13 | 0 |
| 1990 | 6 | 0 |
| 1991 | 10 | 0 |
| 1992 | 10 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 12 | 0 |
| 1996 | 11 | 0 |
| 1997 | 12 | 0 |
| 1998 | 21 | 0 |
| 1999 | 11 | 0 |
| 2000 | 15 | 0 |
| 2001 | 13 | 3 |
| 2002 | 11 | 13 |
| 2003 | 12 | 9 |
| 2004 | 10 | 4 |
| 2005 | 3 | 7 |
| 2006 | 8 | 2 |
| 2007 | 6 | 6 |
| 2008 | 4 | 6 |
| 2009 | 5 | 6 |
| 2010 | 6 | 5 |
| 2011 | 5 | 0 |
| 2012 | 4 | 2 |
| 2013 | 2 | 2 |
| 2014 | 3 | 1 |
| 2015 | 2 | 4 |
| 2016 | 3 | 2 |
| 2017 | 4 | 3 |
| 2018 | 5 | 4 |
| 2019 | 3 | 0 |
| 2020 | 2 | 4 |
| 2021 | 2 | 1 |
| 2022 | 4 | 2 |
| 2023 | 1 | 2 |
| 2024 | 2 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Clock sending apparatus and method, and clock receiving apparatus and method8 Apr 2025US 12,273,112 B2Zte Corporation
- Method and apparatus for wireless communications17 Sep 2024US 12,095,513 B2Northeastern University
- Communication device and communication system28 May 2024US 11,996,962 B2Rohm Co., Ltd.
- Conformance testing method and apparatus, and storage medium19 Sep 2023US 11,764,871 B2Huawei Technologies Co., Ltd.
- Method and related systems for communication via extremely low and ultra low frequency electromagnetic waves25 Oct 2022US 11,483,078 B1
- Method And Apparatus For Wireless Communications7 Nov 2024US 2024/0372632 A1Northeastern University
- Clock sending apparatus and method, and clock receiving apparatus and method16 Mar 2023US 2023/0079791 A1Zte Corporation
- Communication device and communication system2 Feb 2023US 2023/0035309 A1Rohm Co., Ltd.
- Method And Apparatus For Wireless Communications22 Sep 2022US 2022/0303024 A1Northeastern University
- Conformance Testing Method and Apparatus, and Storage Medium14 Jul 2022US 2022/0222972 A1Huawei Technologies Co., Ltd.
Most cited
By later US patents
- Video and audio multiplex transmission system244US 5,231,492 AFujitsu Limited · 1993
- Object oriented audio coding203US 6,108,626 ACSELT - Centro Studi e Laboratori Telecomunicazioni S.p.A. · 2000
- Sound quality of established low bit-rate audio coding systems without loss of decoder compatibility188US 6,226,616 B1Digital Theater Systems, Inc. · 2001
- Compatible signal encode/decode system178US 5,479,168 APacific Microsonics, Inc. · 1995
- Digital output transducer156US 5,051,799 A1991