H04B 10/588
In external modulation systems
Official title: in external modulation systems
H04B10/588 (In external modulation systems) appears on 132 US grants and 119 published applications in this corpus.
Search patents in H04B- Granted patents
- 132
- Published applications
- 119
- Assignees
- 74
- Inventors
- 331
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 1 |
| 2003 | 0 | 0 |
| 2004 | 2 | 3 |
| 2005 | 1 | 1 |
| 2006 | 3 | 0 |
| 2007 | 0 | 3 |
| 2008 | 0 | 1 |
| 2009 | 1 | 2 |
| 2010 | 1 | 1 |
| 2011 | 2 | 2 |
| 2012 | 1 | 2 |
| 2013 | 1 | 3 |
| 2014 | 5 | 9 |
| 2015 | 6 | 10 |
| 2016 | 13 | 14 |
| 2017 | 15 | 12 |
| 2018 | 12 | 17 |
| 2019 | 15 | 13 |
| 2020 | 12 | 11 |
| 2021 | 10 | 7 |
| 2022 | 7 | 2 |
| 2023 | 2 | 1 |
| 2024 | 2 | 2 |
| 2025 | 3 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Optical transmit device21 Jul 2026US 12,689,440 B21FINITY Inc.
- Semiconductor IQ modulator24 Feb 2026US 12,560,852 B2NTT, Inc.
- Efficient nonlinear equalizer for transmitter predistortion22 Apr 2025US 12,283,996 B1Cisco Technology, Inc.
- Wavelength-multiplexed subranging electro-optic modulator (SEOM) for high dynamic range applications21 Jan 2025US 12,206,455 B1Seaford Holdings, LLC
- Method and circuit for reflection cancellation14 Jan 2025US 12,199,398 B2The University of British Columbia
- System, communication apparatus, optical module, method, and optical network26 Mar 2026US 2026/0088909 A1Huawei Technologies Co., Ltd.
- Optical Linearization Technique13 Mar 2025US 2025/0088284 A1AyDeeKay LLC dba Indie Semiconductor
- Pluggable optical module, optical communication system and control method of pluggable optical module23 May 2024US 2024/0168359 A1NEC Corporation
- Optical transmit device4 Apr 2024US 2024/0113786 A1Fujitsu Limited
- Semiconductor IQ Modulator31 Aug 2023US 2023/0273497 A1Nippon Telegraph and Telephone Corporation
Most cited
By later US patents
- Optical transmitters linearized by means of parametric feedback100US 5,161,044 AHarmonic Lightwaves, Inc. · 1992
- Apparatus and method for linearizing an external optical modulator91US 5,321,543 AGeneral Instrument Corporation · 1994
- Optical transmitter85US 5,170,274 AFujitsu Limited · 1992
- Optical transmitter system53US 6,078,414 ANEC Corporation · 2000
- Apparatus and method for linearizing the operation of an external optical modulator37US 5,210,633 AGeneral Instrument Corporation · 1993