H04B 10/541
Digital intensity or amplitude modulation
Official title: {Digital intensity or amplitude modulation}
H04B10/541 (Digital intensity or amplitude modulation) appears on 793 US grants and 806 published applications in this corpus.
Search patents in H04B- Granted patents
- 793
- Published applications
- 806
- Assignees
- 260
- Inventors
- 1,232
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 7 |
| 2003 | 3 | 20 |
| 2004 | 5 | 10 |
| 2005 | 4 | 10 |
| 2006 | 9 | 5 |
| 2007 | 6 | 10 |
| 2008 | 10 | 16 |
| 2009 | 10 | 12 |
| 2010 | 5 | 16 |
| 2011 | 18 | 17 |
| 2012 | 13 | 13 |
| 2013 | 13 | 16 |
| 2014 | 23 | 42 |
| 2015 | 36 | 42 |
| 2016 | 50 | 48 |
| 2017 | 72 | 92 |
| 2018 | 83 | 63 |
| 2019 | 85 | 68 |
| 2020 | 70 | 68 |
| 2021 | 67 | 57 |
| 2022 | 53 | 67 |
| 2023 | 50 | 35 |
| 2024 | 41 | 35 |
| 2025 | 28 | 20 |
| 2026 | 15 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and apparatus to increase optic line capacity15 Sep 2026US 12,739,034 B2Nokia Solutions and Networks Oy
- System and method for solar cell photo-luminescence modulation14 Jul 2026US 12,683,690 B2Purdue Research Foundation
- Digital amplitude noise shift keying to communicate information7 Jul 2026US 12,676,680 B2The Boeing Company
- Systems and methods for in-phase and quadrature modulation16 Jun 2026US 12,659,044 B2Huawei Technologies Co., Ltd.
- Transmission control techniques in quantum cryptographic communication system9 Jun 2026US 12,652,109 B2NEC Corporation
- Optical module with parameter table20 Aug 2026US 2026/0246537 A1Cisco Technology, Inc.
- Phase-Folding Coherent Optical Technology for Optical Communication30 Jul 2026US 2026/0222078 A1Google Inc.
- Apparatus and methods for channel allocation11 Jun 2026US 2026/0163589 A1Infinera Corporation
- Optical transmission system and transmitter21 May 2026US 2026/0142730 A1Fujitsu Limited
- Optical signal generation device and optical signal generation method14 May 2026US 2026/0133462 A1NTT, Inc.
Most cited
By later US patents
- System and method for communication using orbital angular momentum with multiple layer overlay modulation160US 9,077,577 B12015
- Optical transmission system132US 5,543,952 ANippon Telegraph and Telephone Corporation · 1996
- Optical transmission apparatuses, methods, and systems122US 7,826,752 B1Level 3 Communications, LLC · 2010
- Optical I-Q-modulator105US 8,295,710 B2Nokia Siemens Networks Oy · 2012
- Optical method of transmitting digital data81US 5,920,416 A1999