G02B 6/29382
Including at least adding or dropping a signal, i.e. passing the majority
Official title: {including at least adding or dropping a signal, i.e. passing the majority of signals}
G02B6/29382 (Including at least adding or dropping a signal, i.e. passing the majority) appears on 545 US grants and 468 published applications in this corpus.
Search patents in G02B- Granted patents
- 545
- Published applications
- 468
- Assignees
- 276
- Inventors
- 1,052
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 18 | 0 |
| 1999 | 12 | 0 |
| 2000 | 14 | 0 |
| 2001 | 33 | 15 |
| 2002 | 32 | 94 |
| 2003 | 46 | 52 |
| 2004 | 50 | 46 |
| 2005 | 40 | 23 |
| 2006 | 36 | 30 |
| 2007 | 38 | 19 |
| 2008 | 32 | 15 |
| 2009 | 11 | 15 |
| 2010 | 17 | 11 |
| 2011 | 9 | 3 |
| 2012 | 9 | 8 |
| 2013 | 5 | 8 |
| 2014 | 12 | 7 |
| 2015 | 15 | 7 |
| 2016 | 9 | 14 |
| 2017 | 12 | 14 |
| 2018 | 13 | 10 |
| 2019 | 14 | 11 |
| 2020 | 15 | 16 |
| 2021 | 12 | 11 |
| 2022 | 10 | 9 |
| 2023 | 3 | 6 |
| 2024 | 8 | 8 |
| 2025 | 5 | 10 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Contradirectional-filter architecture having low back-reflection15 Sep 2026US 12,736,752 B2Quintessent Inc.
- Mach-Zehnder-Interferometer filter and ring-based wavelength-demultiplexing device19 May 2026US 12,631,934 B2Imec Vzw
- System and methods for gas spectroscopic sensing with photon counting and tunable integrated photonic filters6 Jan 2026US 12,517,039 B2The Trustees of the Stevens Institute of Technology
- Multidrop optical input/output module18 Nov 2025US 12,475,944 B2Rambus Inc.
- Predictive management of a network buffer21 Oct 2025US 12,452,185 B1Cable Television Laboratories, Inc.
- Adaptive thermal control for micro-ring modulators in photonic links8 Oct 2026US 2026/0309943 A1Samsung Electronics Co., Ltd.
- Optical network component configuration27 Aug 2026US 2026/0254550 A1Telefonaktiebolaget LM Ericsson (publ)
- Optical Source Monitoring in Optical Communication System2 Jul 2026US 2026/0189308 A1Ayar Labs, Inc.
- Interlocked n-by-n wavelength selective switch19 Feb 2026US 2026/0050125 A1II-Vi Delaware, Inc.
- Multi-ring resonator shared bus structures for optical communications8 Jan 2026US 2026/0009950 A1InfiniLink Inc.
Most cited
By later US patents
- High reflection isolation optical devices and the method for making the same357US 7,289,733 B1Alliance Fiber Optic Products, Inc. · 2007
- Alternating sequential half duplex communication system218US 4,979,170 AQUALCOMM Incorporated · 1990
- Modular all-optical cross-connect126US 6,614,953 B2Photuris, Inc. · 2003
- Optical add-drop multiplexers for WDM optical communication systems125US 5,778,118 ACiena Corporation · 1998
- Optical routing element for use in fiber optic systems121US 6,356,679 B1K2 Optronics, Inc. · 2002