| Utility: Optical subcarrier dual-path protection and restoration for optical communications networks Filling date: 7 Nov 2025 Issue date: 20 Sep 2022 | 22 Oct 2020 | 20 Sep 2022 |
| Utility: Time division multiple access optical subcarriers Filling date: 7 Nov 2025 Issue date: 20 Sep 2022 | 4 Mar 2020 | 20 Sep 2022 |
| Utility: In-service data plane encryption verification Filling date: 7 Nov 2025 Issue date: 23 Aug 2022 | 20 Feb 2020 | 23 Aug 2022 |
| Utility: Synchronization for subcarrier communication Filling date: 7 Nov 2025 Issue date: 16 Aug 2022 | 20 Sep 2019 | 16 Aug 2022 |
| Utility: Apparatuses and methods for digital subcarrier parameter modifications for optical communication networks Filling date: 7 Nov 2025 Issue date: 21 Jun 2022 | 15 Apr 2019 | 21 Jun 2022 |
| Utility: Hub-leaf laser synchronization Filling date: 7 Nov 2025 Issue date: 7 Jun 2022 | 11 May 2020 | 7 Jun 2022 |
| Utility: Correcting traffic misconnections in optical communications networks Filling date: 7 Nov 2025 Issue date: 17 May 2022 | 6 Jul 2021 | 17 May 2022 |
| Utility: Highly parallel and scalable cyclic redundancy check Filling date: 7 Nov 2025 Issue date: 19 Apr 2022 | 21 Dec 2016 | 19 Apr 2022 |
| Utility: Out-of-band communication channel for subcarrier-based optical communication systems Filling date: 7 Nov 2025 Issue date: 5 Apr 2022 | 4 Jun 2020 | 5 Apr 2022 |
| Utility: Dynamically switching queueing schemes for network switches Filling date: 7 Nov 2025 Issue date: 5 Apr 2022 | 31 Dec 2019 | 5 Apr 2022 |
| Utility: Dynamically switching queueing schemes for network switches Filling date: 7 Nov 2025 Issue date: 29 Mar 2022 | 31 Dec 2019 | 29 Mar 2022 |
| Utility: Time division multiple access optical subcarriers Filling date: 7 Nov 2025 Issue date: 22 Feb 2022 | 4 Mar 2020 | 22 Feb 2022 |
| Utility: Independently routable digital subcarriers for optical communication networks Filling date: 7 Nov 2025 Issue date: 15 Feb 2022 | 7 Feb 2019 | 15 Feb 2022 |
| Utility: External network to network interface and optical express power controls Filling date: 7 Nov 2025 Issue date: 15 Feb 2022 | 20 Dec 2018 | 15 Feb 2022 |
| Utility: Apparatus and method to reduce the impact of coherent crosstalk in optical networks Filling date: 7 Nov 2025 Issue date: 15 Feb 2022 | 12 Dec 2018 | 15 Feb 2022 |
| Utility: Out-of-band communication channel for subcarrier-based optical communication systems Filling date: 7 Nov 2025 Issue date: 1 Feb 2022 | 4 Jun 2020 | 1 Feb 2022 |
| Utility: Printed circuit board having a differential pair routing topology with negative plane routing and impedance correction structures Filling date: 7 Nov 2025 Issue date: 25 Jan 2022 | 20 Jun 2019 | 25 Jan 2022 |
| Utility: Light absorption and scattering devices in a photonic integrated circuit that minimize optical feedback and noise Filling date: 7 Nov 2025 Issue date: 18 Jan 2022 | 24 Jun 2016 | 18 Jan 2022 |
| Utility: Out-of-band communication channel for subcarrier-based optical communication systems Filling date: 7 Nov 2025 Issue date: 4 Jan 2022 | 4 Jun 2020 | 4 Jan 2022 |
| Utility: Code division multiple access optical subcarriers Filling date: 7 Nov 2025 Issue date: 4 Jan 2022 | 4 Mar 2020 | 4 Jan 2022 |
| Utility: Apparatus and method to improve optical reach in bidirectional optical transmission systems employing single-laser coherent transceivers Filling date: 7 Nov 2025 Issue date: 14 Dec 2021 | 21 Dec 2018 | 14 Dec 2021 |
| Utility: Method and apparatus for optical power controls in optical networks Filling date: 7 Nov 2025 Issue date: 7 Dec 2021 | 13 Nov 2019 | 7 Dec 2021 |
| Utility: Out-of-band communication channel for subcarrier-based optical communication systems Filling date: 7 Nov 2025 Issue date: 30 Nov 2021 | 4 Jun 2020 | 30 Nov 2021 |
| Utility: Out-of-band communication channel for sub-carrier-based optical communication systems Filling date: 7 Nov 2025 Issue date: 16 Nov 2021 | 20 Sep 2019 | 16 Nov 2021 |
| Utility: Distribution matching for probabilistic constellation shaping with an arbitrary input/output alphabet Filling date: 7 Nov 2025 Issue date: 14 Sep 2021 | 4 Oct 2018 | 14 Sep 2021 |
| Utility: Frequency division multiple access optical subcarriers Filling date: 7 Nov 2025 Issue date: 17 Aug 2021 | 22 Sep 2019 | 17 Aug 2021 |
| Utility: Out-of-band communication channel for sub-carrier-based optical communication systems Filling date: 7 Nov 2025 Issue date: 17 Aug 2021 | 20 Sep 2019 | 17 Aug 2021 |
| Utility: Subcarrier based data center network architecture Filling date: 7 Nov 2025 Issue date: 17 Aug 2021 | 12 Jul 2019 | 17 Aug 2021 |
| Utility: Out-of-band communication channel for sub-carrier-based optical communication systems Filling date: 7 Nov 2025 Issue date: 10 Aug 2021 | 20 Sep 2019 | 10 Aug 2021 |
| Utility: Frequency division multiple access optical subcarriers Filling date: 7 Nov 2025 Issue date: 27 Jul 2021 | 22 Sep 2019 | 27 Jul 2021 |
| Utility: Nonlinear tolerant super-Gaussian distribution for probabilistic shaping modulation Filling date: 7 Nov 2025 Issue date: 15 Jun 2021 | 9 Oct 2018 | 15 Jun 2021 |
| Utility: Synchronization for subcarrier communication Filling date: 7 Nov 2025 Issue date: 8 Jun 2021 | 20 Sep 2019 | 8 Jun 2021 |
| Utility: Independently routable digital subcarriers with configurable spacing for optical communication networks Filling date: 7 Nov 2025 Issue date: 27 Apr 2021 | 7 Feb 2019 | 27 Apr 2021 |
| Utility: Scalable synthesis of signals of high symbol rate using lower symbol rate DSPS Filling date: 7 Nov 2025 Issue date: 13 Apr 2021 | 11 Mar 2019 | 13 Apr 2021 |
| Utility: Bidirectional optical communications Filling date: 7 Nov 2025 Issue date: 6 Apr 2021 | 20 Sep 2019 | 6 Apr 2021 |
| Utility: Synchronization for subcarrier communication Filling date: 7 Nov 2025 Issue date: 30 Mar 2021 | 20 Sep 2019 | 30 Mar 2021 |
| Utility: Out-of-band communication channel for sub-carrier-based optical communication systems Filling date: 7 Nov 2025 Issue date: 30 Mar 2021 | 20 Sep 2019 | 30 Mar 2021 |
| Utility: Streaming telemetry for optical network devices Filling date: 7 Nov 2025 Issue date: 30 Mar 2021 | 11 Mar 2019 | 30 Mar 2021 |
| Utility: Low-cost nano-heat pipe Filling date: 7 Nov 2025 Issue date: 30 Mar 2021 | 7 Jan 2019 | 30 Mar 2021 |
| Utility: Multilayer packet optical communication networks Filling date: 7 Nov 2025 Issue date: 9 Feb 2021 | 30 Sep 2015 | 9 Feb 2021 |
| Utility: Clock recovery for subcarrier based coherent optical systems Filling date: 7 Nov 2025 Issue date: 2 Feb 2021 | 25 Jun 2019 | 2 Feb 2021 |
| Utility: Reconstruction of an optical network link in a link viewer based on a text file Filling date: 7 Nov 2025 Issue date: 2 Feb 2021 | 15 Oct 2014 | 2 Feb 2021 |
| Utility: End point mapping service to assist transport segment routing Filling date: 7 Nov 2025 Issue date: 17 Nov 2020 | 6 Dec 2016 | 17 Nov 2020 |
| Utility: Fast restoration using SDFEC defects in coherent optical networks Filling date: 7 Nov 2025 Issue date: 6 Oct 2020 | 5 Jun 2018 | 6 Oct 2020 |
| Utility: Method and apparatus for rapid recovery of optical power after transient events in C+L band optical networks Filling date: 7 Nov 2025 Issue date: 22 Sep 2020 | 13 Nov 2019 | 22 Sep 2020 |
| Utility: Modulation format change and license updating Filling date: 7 Nov 2025 Issue date: 8 Sep 2020 | 2 Jul 2013 | 8 Sep 2020 |
| Utility: Tunable waveguide devices Filling date: 7 Nov 2025 Issue date: 11 Aug 2020 | 9 Jan 2018 | 11 Aug 2020 |
| Utility: Hybrid optical transmitter and/or receiver structure Filling date: 7 Nov 2025 Issue date: 7 Jul 2020 | 7 Jan 2019 | 7 Jul 2020 |
| Utility: Photonic integrated circuit Filling date: 7 Nov 2025 Issue date: 12 May 2020 | 4 Jan 2017 | 12 May 2020 |
| Utility: Asynchronous bias control for an optical modulator using a multiple tone detection technique with phase correction Filling date: 7 Nov 2025 Issue date: 14 Apr 2020 | 8 Apr 2016 | 14 Apr 2020 |
