H04B 10/5563
Digital frequency modulation
Official title: {Digital frequency modulation}
H04B10/5563 (Digital frequency modulation) appears on 85 US grants and 87 published applications in this corpus.
Search patents in H04B- Granted patents
- 85
- Published applications
- 87
- Assignees
- 54
- Inventors
- 162
- Latest grant
- 4 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 4 |
| 2006 | 0 | 3 |
| 2007 | 1 | 1 |
| 2008 | 4 | 2 |
| 2009 | 2 | 4 |
| 2010 | 0 | 4 |
| 2011 | 7 | 1 |
| 2012 | 1 | 1 |
| 2013 | 2 | 5 |
| 2014 | 4 | 5 |
| 2015 | 2 | 12 |
| 2016 | 4 | 7 |
| 2017 | 11 | 6 |
| 2018 | 11 | 8 |
| 2019 | 10 | 5 |
| 2020 | 7 | 6 |
| 2021 | 5 | 3 |
| 2022 | 1 | 4 |
| 2023 | 6 | 2 |
| 2024 | 3 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for tuning a power characteristic of an optical frequency comb4 Mar 2025US 12,244,349 B1Cable Television Laboratories, Inc.
- Apparatus and method for optical wireless communication based on color M-ary frequency shift keying27 Aug 2024US 12,074,645 B2Kookmin University Industry Academy Cooperation Foundation
- System and method for cryogenic optoelectronic data link11 Jun 2024US 12,009,869 B2Center for Technology Licensing at Cornell University
- Modulation method, apparatus, and system for imaging scanning signal synchronization28 May 2024US 11,996,894 B2Mech-Mind Robotics Technologies Ltd.
- Systems and methods for tuning a power characteristic of an optical frequency comb10 Oct 2023US 11,784,719 B1Cable Television Laboratories, Inc.
- Methods and systems for last mile cable-television data transmission to subscribers over fiber-optics26 Mar 2026US 2026/0088902 A1
- Method and apparatus for wavelength control in optical communication system, and coherent optical communication apparatus2 Oct 2025US 2025/0309993 A1InnoLight Technology (Suzhou) Ltd.
- Apparatus and method for optical wireless communication based on color m-ary frequency shift keying19 Oct 2023US 2023/0336250 A1Kookmin University Industry Academy Cooperation Foundation
- System and method for cryogenic optoelectronic data link27 Jul 2023US 2023/0239058 A1Center for Technology Licensing at Cornell University
- Apparatus and method for optical wireless communication based on color m-ary frequency shift keying10 Nov 2022US 2022/0360338 A1Kookmin University Industry Academy Cooperation Foundation
Most cited
By later US patents
- Optical frequency division multiplexing transmitter and optical frequency division multiplexing transmission apparatus38US 5,305,134 AHitachi, Ltd. · 1994
- Optical FM source based on intra-cavity phase and amplitude modulation in lasers18US 7,613,401 B2Finisar Corporation · 2009
- System and method for cryogenic optoelectronic data link17US 10,097,281 B1Center for Technology Licensing at Cornell University · 2018
- Systems and methods for concealing waveform properties16US 10,498,464 B2Raytheon Company · 2019
- Optical FSK/SSB modulator having intensity balance function14US 7,957,652 B2National Institute of Information and Communications Technology · 2011