H04B 10/677
For differentially modulated signal
Official title: {for differentially modulated signal, e.g. DPSK signals}
H04B10/677 (For differentially modulated signal) appears on 188 US grants and 240 published applications in this corpus.
Search patents in H04B- Granted patents
- 188
- Published applications
- 240
- Assignees
- 107
- Inventors
- 402
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 0 | 3 |
| 2005 | 0 | 3 |
| 2006 | 2 | 11 |
| 2007 | 3 | 11 |
| 2008 | 9 | 26 |
| 2009 | 10 | 42 |
| 2010 | 18 | 33 |
| 2011 | 29 | 31 |
| 2012 | 28 | 20 |
| 2013 | 21 | 12 |
| 2014 | 18 | 6 |
| 2015 | 6 | 2 |
| 2016 | 6 | 3 |
| 2017 | 2 | 4 |
| 2018 | 4 | 6 |
| 2019 | 4 | 7 |
| 2020 | 9 | 7 |
| 2021 | 4 | 2 |
| 2022 | 4 | 4 |
| 2023 | 4 | 2 |
| 2024 | 4 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wavelength reference having repeating spectral features and unique spectral features24 Feb 2026US 12,560,754 B2II-Vi Delaware, Inc.
- High-speed optical analog-to-digital converter based on compressive sensing15 Oct 2024US 12,119,882 B2The Regents of the University of California
- Method for transmitting or receiving signal in low-bit quantization system and device therefor4 Jun 2024US 12,003,277 B2LG Electronics Inc.
- Polarization independent DQPSK demodulation integrated optical chip30 Jan 2024US 11,888,531 B1Beijing Zhongke Guoguang Quantum Technology Co., Ltd.
- Systems and methods for carrier phase recovery2 Jan 2024US 11,863,297 B1Cable Television Laboratories, Inc.
- Differential phase shift keying demodulator8 Oct 2026US 2026/0312694 A1BAE Systems Information and Electronic Systems Integration Inc.
- Wavelength reference having repeating spectral features and unique spectral features4 Jun 2026US 2026/0153669 A1II-Vi Delaware, Inc.
- Optical half-adder and averaging data channels using nonlinear wave mixing20 Feb 2025US 2025/0062834 A1University of Southern California
- Wavelength Reference Having Repeating Spectral Features and Unique Spectral Features30 Nov 2023US 2023/0384541 A1II-Vi Delaware, Inc.
- High-speed optical analog-to-digital converter based on compressive sensing7 Sep 2023US 2023/0283383 A1The Regents of the University of California
Most cited
By later US patents
- Optical transmission apparatuses, methods, and systems122US 7,826,752 B1Level 3 Communications, LLC · 2010
- Interferometric, self-homodyne optical receiver and method and optical transmission system incorporating same34US 5,319,438 ABoard of Regents, The University of Texas System · 1994
- Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them27US 7,817,923 B2Fujitsu Limited · 2010
- Direct detecting of optical PSK signals26US 5,355,243 ANorthern Telecom Limited · 1994
- Signal equalizer in a coherent optical receiver26US 8,005,368 B2Ciena Corporation · 2011