H04J 14/00
Optical multiplex systems
H04J14/00 (Optical multiplex systems) appears on 10,432 US grants and 10,429 published applications in this corpus.
Search patents in H04J- Granted patents
- 10,432
- Published applications
- 10,429
- Assignees
- 1,721
- Inventors
- 12,523
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 12 | 0 |
| 1988 | 18 | 0 |
| 1989 | 18 | 0 |
| 1990 | 23 | 0 |
| 1991 | 22 | 0 |
| 1992 | 34 | 0 |
| 1993 | 30 | 0 |
| 1994 | 50 | 0 |
| 1995 | 47 | 0 |
| 1996 | 77 | 0 |
| 1997 | 88 | 0 |
| 1998 | 155 | 0 |
| 1999 | 161 | 0 |
| 2000 | 173 | 0 |
| 2001 | 235 | 123 |
| 2002 | 263 | 523 |
| 2003 | 332 | 444 |
| 2004 | 274 | 483 |
| 2005 | 248 | 376 |
| 2006 | 381 | 333 |
| 2007 | 358 | 392 |
| 2008 | 304 | 309 |
| 2009 | 299 | 395 |
| 2010 | 331 | 375 |
| 2011 | 276 | 335 |
| 2012 | 333 | 428 |
| 2013 | 378 | 422 |
| 2014 | 457 | 468 |
| 2015 | 504 | 527 |
| 2016 | 501 | 469 |
| 2017 | 581 | 502 |
| 2018 | 478 | 532 |
| 2019 | 573 | 477 |
| 2020 | 506 | 448 |
| 2021 | 404 | 372 |
| 2022 | 360 | 370 |
| 2023 | 323 | 431 |
| 2024 | 306 | 341 |
| 2025 | 259 | 330 |
| 2026 | 229 | 224 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04J 14/02Wavelength-division multiplex systems8,793
- H04J 14/06Polarisation multiplex systems957
- H04J 14/08Time-division multiplex systems843
- H04J 14/005Optical code multiplex274
- H04J 14/04Mode multiplex systems206
- H04J 14/05Spatial multiplexing systems161
- H04J 14/002Coherencemultiplexing65
- H04J 14/07Orbital angular momentum [oam] multiplex systems64
Recent patents
- Technologies for optical demultiplexing with backwards compatibility6 Oct 2026US 12,754,364 B2Intel Corporation
- Optical time domain reflectometer (OTDR)-based fiber monitoring optimization6 Oct 2026US 12,756,459 B2Viavi Solutions Inc.
- Optical transmitter including splitting elements, external modulators, and wavelength multiplexers, and optical transceiver including polarization separation elements, wavelength demultiplexers, polarization rotation elements, and photodetectors6 Oct 2026US 12,756,476 B2Mitsubishi Electric Corporation
- Optical fiber input/output tray with wavelength division multiplexing support for a co-packaged optical switch6 Oct 2026US 12,756,492 B2Quanta Computer Inc.
- Electrical-to-coherent optical-to-electrical data communication cable assembly29 Sep 2026US 12,750,139 B2
- Clock forwarding in packaged optics links8 Oct 2026US 2026/0312713 A1Lightmatter, Inc.
- Parallelized Optical Link Calibration Over an Optical Section8 Oct 2026US 2026/0312714 A1Ciena Corporation
- Wavelength cross connect device, and wavelength cross connect method8 Oct 2026US 2026/0313275 A1NTT, Inc.
- Optical transmission device and optical transmission method1 Oct 2026US 2026/0303209 A1NTT, Inc.
- Dual-polarization bidirectional optical devices1 Oct 2026US 2026/0303218 A1
Most cited
By later US patents
- Method and apparatus for demodulating signals in a pulse oximetry system1,090US 6,229,856 B1Masimo Corporation · 2001
- Method and apparatus for demodulating signals in a pulse oximetry system1,044US 6,643,530 B2Masimo Corporation · 2003
- Method and apparatus for demodulating signals in a pulse oximetry system989US 7,003,339 B2Masimo Corporation · 2006
- Method and apparatus for demodulating signals in a pulse oximetry system851US 7,221,971 B2Masimo Corporation · 2007
- Method and apparatus for demodulating signals in a pulse oximetry system705US 8,185,180 B2Masimo Corporation · 2012