G02F 1/3521
Using a directional coupler
Official title: {using a directional coupler}
G02F1/3521 (Using a directional coupler) appears on 43 US grants and 31 published applications in this corpus.
Search patents in G02F- Granted patents
- 43
- Published applications
- 31
- Assignees
- 28
- Inventors
- 87
- Latest grant
- 28 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 2 |
| 2003 | 1 | 3 |
| 2004 | 7 | 5 |
| 2005 | 3 | 4 |
| 2006 | 3 | 0 |
| 2007 | 1 | 0 |
| 2008 | 2 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 2 |
| 2016 | 2 | 2 |
| 2017 | 2 | 0 |
| 2018 | 2 | 5 |
| 2019 | 4 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 2 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cascadable photonic circuits with nonlinear amplitude thresholders28 Oct 2025US 12,455,491 B2Milkshake Technology Inc.
- Systems and methods for activation functions for photonic neural networks4 Oct 2022US 11,460,753 B2The Board of Trustees of the Leland Stanford Junior University
- Optical logic gates7 Apr 2020US 10,613,415 B2Hewlett Packard Enterprise Development LP
- Optical logic gates20 Aug 2019US 10,386,698 B2Hewlett Packard Enterprise Development LP
- All-optical single-atom photon router controlled by a single photon28 May 2019US 10,304,535 B2Yeda Research and Development Co. Ltd.
- Fiber based processing system3 Sep 2026US 2026/0259468 A1Cognifiber Ltd.
- Integrated Laser Stabilization with Built-In Isolation19 Mar 2026US 2026/0081401 A1The Board of Trustees of the Leland Stanford Junior University
- Supercontinuum system with spectral detection7 Aug 2025US 2025/0251640 A1Nkt Photonics A/S
- Cascadable photonic circuits with nonlinear amplitude thresholders13 Feb 2025US 2025/0053065 A1Milkshake Technology Inc.
- Systems and Methods for Activation Functions for Photonic Neural Networks22 Apr 2021US 2021/0116781 A1The Board of Trustees of the Leland Stanford Junior University
Most cited
By later US patents
- Nanocomposite materials with engineered properties395US 6,710,366 B1UltraDots, Inc. · 2004
- Fabry-Perot laser with wavelength control131US 6,741,624 B2R J Mears LLC · 2004
- Optical devices with engineered nonlinear nanocomposite materials126US 6,819,845 B2UltraDots, Inc. · 2004
- Configurable aperiodic grating device123US 7,123,792 B1RJ Mears, LLC · 2006
- Methods of forming quantum dots of Group IV semiconductor materials92US 6,794,265 B2UltraDots, Inc. · 2004