G01C 19/725
Using nxn optical couplers
Official title: {using nxn optical couplers, e.g. 3x3 couplers}
G01C19/725 (Using nxn optical couplers) appears on 41 US grants and 21 published applications in this corpus.
Search patents in G01C- Granted patents
- 41
- Published applications
- 21
- Assignees
- 27
- Inventors
- 60
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 2 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 1 | 1 |
| 2018 | 2 | 2 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 2 | 2 |
| 2023 | 0 | 3 |
| 2024 | 2 | 3 |
| 2025 | 4 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Mitigating bias instabilities in optical gyroscopes4 Nov 2025US 12,460,931 B2Anello Photonics, Inc.
- Gyroscope assembly with ring resonator and interference path9 Sep 2025US 12,411,010 B2Robert Bosch GmbH
- Multi-axis fiber optic gyroscope photonic integrated circuit for inertial measurement units and inertial navigation systems8 Jul 2025US 12,352,574 B2Emcore Corporation
- Fiber-optic gyroscope with a dual-injection polarization-maintaining 3x3 directional coupler for enhanced measurement sensitivity through heterodyne6 May 2025US 12,292,287 B2
- Mitigating bias instabilities in optical gyroscopes22 Oct 2024US 12,123,718 B1Anello Photonics, Inc.
- Integrated interferometric optical gyroscope, assembly, system, and method for calculating rotation speed information8 Oct 2026US 2026/0309496 A1Silith Technology Pte. Ltd.
- Thin-film lithium-niobate (tfln)-based modulator for fiber optic gyroscopes and other applications23 Jul 2026US 2026/0210717 A1Optilab, LLC
- Mitigating bias instabilities in optical gyroscopes2 Jan 2025US 2025/0003751 A1Anello Photonics, Inc.
- Lidar-gyroscope chip assemblies11 Jul 2024US 2024/0230901 A1Oscps Motion Sensing Inc.
- Integrated photonics chip with electro-optic material based waveguide components27 Jun 2024US 2024/0210175 A1Anello Photonics, Inc.
Most cited
By later US patents
- Integrated optical circuit65US 6,163,632 ABookham Technology PLC · 2000
- Fiber-optic gyroscope integrated on a silicon substrate45US 5,194,917 AStandard Elektrik Lorenz AG · 1993
- Optical fiber gyroscope with (3.times.3) directional coupler36US 4,440,498 AThe United States of America as represented by the Secretary of the Navy · 1984
- Sensor having optical passive ring resonator using sagnac effect20US 5,327,215 ABodenseewerk Geratetechnik GmbH · 1994
- Fiber optic gyroscope operating with unpolarized light source18US 4,653,917 AThe United States of America as represented by the Secretary of the Navy · 1987