High speed bidirectional optical time-domain reflectometer (OTDR)-based testing of device under test
US-12526044-B2 · Jan 13, 2026 · US
using a variable optical attenuator
using a variable optical attenuator · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04B10/674 |
| Official title | {using a variable optical attenuator} |
| Display label | using a variable optical attenuator |
| Total patents | 46 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 6 |
| 2017 | 4 |
| 2018 | 4 |
| 2019 | 2 |
| 2020 | 2 |
| 2021 | 4 |
| 2022 | 4 |
| 2023 | 9 |
| 2024 | 7 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System for forming a configurable optical amplifier
US-2025030216-A1 · Jan 23, 2025 · US
High speed bidirectional optical time-domain reflectometer (otdr)-based testing of device under test
US-2024421900-A1 · Dec 19, 2024 · US
Optical time-domain reflectometer (OTDR)-based high reflective event measurement
US-12088336-B2 · Sep 10, 2024 · US
Systems and methods for detecting a location of the optical elements causing multipath interference in an optical link
US-12088337-B2 · Sep 10, 2024 · US
Light-receiving device
US-12050333-B2 · Jul 30, 2024 · US
High speed bidirectional optical time-domain reflectometer (OTDR)-based testing of device under test
US-12028107-B2 · Jul 2, 2024 · US
Systems and methods for detecting a location of the optical elements causing multipath interference in an optical link
US-2024120995-A1 · Apr 11, 2024 · US
High speed bidirectional optical time-domain reflectometer (otdr)-based testing of device under test
US-2024022322-A1 · Jan 18, 2024 · US
High speed bidirectional optical time-domain reflectometer (OTDR)-based testing of device under test
US-11811449-B2 · Nov 7, 2023 · US
High speed bidirectional optical time-domain reflectometer (OTDR)-based testing of device under test
US-11811450-B2 · Nov 7, 2023 · US
In-service characterization of nonlinear interference on a per-span basis
US-11811459-B1 · Nov 7, 2023 · US
Optical time-domain reflectometer (otdr)-based high reflective event measurement
US-2023283367-A1 · Sep 7, 2023 · US
Systems and methods for maintaining equipment of a passive optical network
US-11742944-B1 · Aug 29, 2023 · US
Loss-based wavelength meter
US-11683092-B2 · Jun 20, 2023 · US
Optical time-domain reflectometer (OTDR)-based high reflective event measurement
US-11646789-B2 · May 9, 2023 · US
Optical time-domain reflectometer (otdr)-based high reflective event measurement
US-2023073872-A1 · Mar 9, 2023 · US
Systems and methods for maintaining equipment of a passive optical network
US-11575432-B1 · Feb 7, 2023 · US
High speed bidirectional optical time-domain reflectometer (otdr)-based testing of device under test
US-2022360327-A1 · Nov 10, 2022 · US
High speed bidirectional optical time-domain reflectometer (otdr)-based testing of device under test
US-2022345216-A1 · Oct 27, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04B10/674?
- CPC H04B10/674 is the Cooperative Patent Classification code for “using a variable optical attenuator.”
- How many patents are filed under CPC H04B10/674 (using a variable optical attenuator)?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC H04B10/674 growing?
- Publication counts under this code: 7 in 2024 vs 1 in 2025 (latest complete years).