| Utility: Hierarchical resource tree allocation Filling date: 6 Sep 2025 Issue date: 31 Mar 2020 | 11 Mar 2016 | 31 Mar 2020 |
| Utility: Receiver automatic gain control systems and methods for asymmetrical or unbalanced constellations Filling date: 6 Sep 2025 Issue date: 17 Mar 2020 | 4 Mar 2019 | 17 Mar 2020 |
| Utility: Systems and methods for compensating coherent optics delay asymmetry in a packet optical network Filling date: 6 Sep 2025 Issue date: 17 Mar 2020 | 23 Jul 2018 | 17 Mar 2020 |
| Utility: Systems and methods for achieving best effort home route capacity on protection paths during optical restoration Filling date: 6 Sep 2025 Issue date: 10 Mar 2020 | 27 Nov 2018 | 10 Mar 2020 |
| Utility: Method and system of mitigating network attacks Filling date: 6 Sep 2025 Issue date: 3 Mar 2020 | 3 Jun 2016 | 3 Mar 2020 |
| Utility: Compensation of transmitter or receiver defects in an optical communications system Filling date: 6 Sep 2025 Issue date: 25 Feb 2020 | 23 Nov 2018 | 25 Feb 2020 |
| Utility: Flexible ethernet encryption systems and methods Filling date: 6 Sep 2025 Issue date: 18 Feb 2020 | 24 Jan 2019 | 18 Feb 2020 |
| Utility: Systems and methods for mesh restoration in networks due to intra-node faults Filling date: 6 Sep 2025 Issue date: 11 Feb 2020 | 21 May 2018 | 11 Feb 2020 |
| Utility: Automatic optical link calibration with channel holders Filling date: 6 Sep 2025 Issue date: 28 Jan 2020 | 13 Nov 2018 | 28 Jan 2020 |
| Utility: Multi-fiber interface automatic power reduction systems and methods Filling date: 6 Sep 2025 Issue date: 21 Jan 2020 | 26 Mar 2019 | 21 Jan 2020 |
| Utility: Dynamic reservation protocol for 5G network slicing Filling date: 6 Sep 2025 Issue date: 21 Jan 2020 | 29 May 2018 | 21 Jan 2020 |
| Utility: Segment routing traffic engineering based on link utilization Filling date: 6 Sep 2025 Issue date: 21 Jan 2020 | 5 Feb 2018 | 21 Jan 2020 |
| Utility: Logical control seams in optical networks to improve restoration speed or timing for capacity adds Filling date: 6 Sep 2025 Issue date: 14 Jan 2020 | 23 Jan 2019 | 14 Jan 2020 |
| Utility: Service synchronization in retain home path scenarios in a control plane network Filling date: 6 Sep 2025 Issue date: 14 Jan 2020 | 10 Sep 2018 | 14 Jan 2020 |
| Utility: Systems and methods for error-free reconstruction of transmitted symbols in a coherent receiver Filling date: 6 Sep 2025 Issue date: 31 Dec 2019 | 18 Dec 2017 | 31 Dec 2019 |
| Utility: High-order phase tracking loop with segmented proportional and integral controls Filling date: 6 Sep 2025 Issue date: 24 Dec 2019 | 27 Feb 2019 | 24 Dec 2019 |
| Utility: Flexible routing in a fiber tray for use in a fiber optic assembly Filling date: 6 Sep 2025 Issue date: 17 Dec 2019 | 8 Feb 2018 | 17 Dec 2019 |
| Utility: Path computation in multi-layer networks Filling date: 6 Sep 2025 Issue date: 17 Dec 2019 | 25 Nov 2015 | 17 Dec 2019 |
| Utility: Hierarchical encapsulation acceleration Filling date: 6 Sep 2025 Issue date: 10 Dec 2019 | 10 May 2017 | 10 Dec 2019 |
| Utility: Power management for network device line modules Filling date: 6 Sep 2025 Issue date: 10 Dec 2019 | 28 Apr 2017 | 10 Dec 2019 |
| Utility: OTN adaptation for support of subrate granularity and flexibility and for distribution across multiple modem engines Filling date: 6 Sep 2025 Issue date: 3 Dec 2019 | 21 Sep 2018 | 3 Dec 2019 |
| Utility: Systems and methods for coordinating layer 1 and layer 2 protection switching techniques for efficient layer 2 traffic recovery Filling date: 6 Sep 2025 Issue date: 26 Nov 2019 | 24 Sep 2018 | 26 Nov 2019 |
| Utility: Virtualized sections for sectional control of optical links Filling date: 6 Sep 2025 Issue date: 26 Nov 2019 | 29 Sep 2017 | 26 Nov 2019 |
| Utility: Traffic-adaptive network control systems and methods Filling date: 6 Sep 2025 Issue date: 26 Nov 2019 | 8 Feb 2016 | 26 Nov 2019 |
| Utility: Coordinated and scheduled standards-based intervals in network elements Filling date: 6 Sep 2025 Issue date: 19 Nov 2019 | 3 Jan 2018 | 19 Nov 2019 |
| Utility: Adaptive communication network with cross-point switches Filling date: 6 Sep 2025 Issue date: 12 Nov 2019 | 11 Dec 2017 | 12 Nov 2019 |
| Utility: Scaling operations, administration, and maintenance sessions in packet networks Filling date: 6 Sep 2025 Issue date: 12 Nov 2019 | 5 Apr 2017 | 12 Nov 2019 |
| Utility: Flexible grid optical spectrum transmitter, receiver, and transceiver Filling date: 6 Sep 2025 Issue date: 29 Oct 2019 | 20 Jan 2017 | 29 Oct 2019 |
| Utility: Management of flexible grid and supercarriers in optical networks using a data model Filling date: 6 Sep 2025 Issue date: 22 Oct 2019 | 30 Nov 2018 | 22 Oct 2019 |
| Utility: Channel pre-combining in colorless, directionless, and contentionless optical architectures Filling date: 6 Sep 2025 Issue date: 22 Oct 2019 | 26 Jan 2018 | 22 Oct 2019 |
| Utility: Methods and assemblies for using electrostriction to characterize properties of optical fiber Filling date: 6 Sep 2025 Issue date: 15 Oct 2019 | 1 Dec 2017 | 15 Oct 2019 |
| Utility: Optically isolated photodiode for high sensitivity application Filling date: 6 Sep 2025 Issue date: 15 Oct 2019 | 10 Feb 2017 | 15 Oct 2019 |
| Utility: Handling channel holder failures in channel holder equipped optical links Filling date: 6 Sep 2025 Issue date: 8 Oct 2019 | 26 Feb 2019 | 8 Oct 2019 |
| Utility: Cable management system in an air-cooled housing Filling date: 6 Sep 2025 Issue date: 8 Oct 2019 | 23 Jan 2019 | 8 Oct 2019 |
| Utility: Systems and methods for selecting efficient messaging between services Filling date: 6 Sep 2025 Issue date: 8 Oct 2019 | 20 Sep 2016 | 8 Oct 2019 |
| Utility: Active heatsink lid Filling date: 6 Sep 2025 Issue date: 8 Oct 2019 | 30 Jun 2016 | 8 Oct 2019 |
| Utility: Systems and methods for tracking, predicting, and mitigating advanced persistent threats in networks Filling date: 6 Sep 2025 Issue date: 8 Oct 2019 | 13 Apr 2015 | 8 Oct 2019 |
| Utility: Extremely-fine resolution sub-ranging current mode Digital-Analog-Converter using Sigma-Delta modulators Filling date: 6 Sep 2025 Issue date: 24 Sep 2019 | 29 Nov 2018 | 24 Sep 2019 |
| Utility: Flexible ethernet switching systems and methods Filling date: 6 Sep 2025 Issue date: 24 Sep 2019 | 28 Sep 2017 | 24 Sep 2019 |
| Utility: Frontplane communication network between multiple pluggable modules on a single faceplate Filling date: 6 Sep 2025 Issue date: 24 Sep 2019 | 28 Oct 2015 | 24 Sep 2019 |
| Utility: Scalable broadband metro network architecture Filling date: 6 Sep 2025 Issue date: 24 Sep 2019 | 13 Apr 2015 | 24 Sep 2019 |
| Utility: Optical fiber characterization measurement systems and methods Filling date: 6 Sep 2025 Issue date: 10 Sep 2019 | 22 May 2018 | 10 Sep 2019 |
| Utility: Gridless optical routing and spectrum assignment Filling date: 6 Sep 2025 Issue date: 10 Sep 2019 | 30 Sep 2016 | 10 Sep 2019 |
| Utility: Flexible grid bulk spectrum assignment systems and methods Filling date: 6 Sep 2025 Issue date: 3 Sep 2019 | 18 Oct 2018 | 3 Sep 2019 |
| Utility: Path computation based on dynamic performance monitoring systems and methods in optical networks Filling date: 6 Sep 2025 Issue date: 3 Sep 2019 | 28 Feb 2018 | 3 Sep 2019 |
| Utility: G.8032 misconfiguration detection systems and methods Filling date: 6 Sep 2025 Issue date: 3 Sep 2019 | 8 Mar 2017 | 3 Sep 2019 |
| Utility: Network level protection route evaluation systems and methods Filling date: 6 Sep 2025 Issue date: 3 Sep 2019 | 3 Mar 2017 | 3 Sep 2019 |
| Utility: Spread weave induced skew minimization Filling date: 6 Sep 2025 Issue date: 3 Sep 2019 | 20 May 2016 | 3 Sep 2019 |
| Utility: Optical module heatsink lifter and method Filling date: 6 Sep 2025 Issue date: 3 Sep 2019 | 17 Mar 2016 | 3 Sep 2019 |
| Utility: Client protection switch in optical pluggable transceivers activated through fast electrical data squelch Filling date: 6 Sep 2025 Issue date: 27 Aug 2019 | 10 Sep 2018 | 27 Aug 2019 |
